RESOURCE :https://www.dogonews.com/2017/2/19/sneaky-venus-flytraps-use-prey-for-nutrients-and-energy

   
https://botany.org/bsa/misc/carn.html

2. Venus Flytraps need energy. Their main source of energy is through photosynthesis, like other plants. For example, it needs energy for carrying out respiration.
3. It traps the insects between its jaws. It then lets out a liquid to help to digest the food. The plant takes in nitrogen and  phosphorus from the insect. They still depend on photosynthesis mainly for energy.
4. Like other plants, Venus Flytraps gather nutrients from gases in the air and nutrients in the soil. They have chlorophyll to help them make food.

Resources:

1. Energy is all around us and it is a part of us. It is everywhere!

Our universe is made from energy and it is fundamental to the existence of everything!

It exists as light, heat, sound, mass, moving objects, gravity, fuel, chemicals, and electricity. We use many of these different types of energy to enhance our lives every day.
Source: http://solarschools.net/resources/stuff/what_is_energy.aspx
2. The Venus flytrap does need energy, it need energy to carry out life processes such as eating other insects for nutrients as they live in poor soil and is better off eating insects then taking the nutrients from the ground.
Source: https://botany.org/bsa/misc/carn.html
3. It gets food mainly using its leaves to photosynthesize and the insects too.
4. Yeah.  it has green leaves with chlorophyll that can photosynthesize 
( Both 3 and 4 are based on my general knowledge. )

Carnivorous plants actually get their energy from photosynthesis, just like other plants do. As you probably know, in photosynthesis plants use light energy to make sugar from carbon dioxide and water. Oxygen is a waste product. Plants make other molecules from the sugar, like starch for energy storage, or cellulose for structure.

They use the insects for nutrients like nitrogen and phosphorus. These atoms are the building blocks for proteins and other molecules. The plants break down the insects using enzymes, acids, and even little bacterial helpers. This is how we break down our food in our digestive systems. Then they absorb the broken-down molecules of their prey.

Carnivorous plants grow in places where there aren’t many nutrients in the soil. Bacteria in soil usually help break down dead plants and animals into molecules that other plants can use as fertilizer. In sandy places there isn’t much “dead stuff” in the soil. Venus fly traps do well in sandy soil. I live in Wisconsin where we have bogs that are very acidic. Bacteria don’t grow well in acidic water, so when plants die, they don’t break down quickly. Pitcher plants and sun dews grow in the bogs. http://scienceline.ucsb.edu/getkey.php?key=3937
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3) Like other plants, Venus' Flytraps gather nutrients from gases in the air and nutrients in the soil. However, they live in poor soil and are healthier if they get nutrients from insects. Carnivorous plants live all over the world but the Venus Flytrap is native to select boggy areas in North and South Carolina. https://botany.org/bsa/misc/carn.html
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4) The Venus flytrap is a carnivorous plant native to subtropical wetlands on the East Coast of the United States in North Carolina and South Carolina. Due to where it lives, it is a carnivorous plant to get energy easily. https://en.wikipedia.org/wiki/Venus_flytrap
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Energy comes in different forms:

People use energy for everything from making a jump shot to sending astronauts into space.

There are two types of energy:

For example, the food a person eats contains chemical energy, and a person's body stores this energy until he or she uses it as kinetic energy during work or play.
https://www.eia.gov/energyexplained/index.cfm?page=about_home.

2.Yes!It also needs energy for its life processes.

3. it lures its victim with sweet-smelling nectar, secreted on its steel-trap-shaped leaves. Unsuspecting prey land on the leaf in search of a reward but instead trip the bristly trigger hairs on the leaf and find themselves imprisoned behind the interlocking teeth of the leaf edges. There are between three and six trigger hairs on the surface of each leaf. If the same hair is touched twice or if two hairs are touched within a 20-second interval, the cells on the outer surface of the leaf expand rapidly, and the trap snaps shut instantly. If insect secretions, such as uric acid, stimulate the trap, it will clamp down further on the prey and form an airtight seal. Once the trap closes, the digestive glands that line the interior edge of the leaf secrete fluids that dissolve the soft parts of the prey, kill bacteria and fungi, and break down the insect with enzymes to extract the essential nutrients. These nutrients are absorbed into the leaf, and five to 12 days following capture, the trap will reopen to release the leftover exoskeleton.  After three to five meals, the trap will no longer capture prey but will spend another two to three months simply photosynthesizing before it drops off the plant.
https://www.scientificamerican.com/article/how-does-the-venus-flytra/


4.Yes!It is able to photosynthesize at a period of time  like other plants.(Don't understand explanation?Read no.3)

The Venus Flytrap gets (sun)light as a form of energy to undergo photosynthesis to produce its own food and thus was classified as a plant.The energy obtained by digesting insects is extra energy but still necessary.

Energy is a word with more than one meaning.

  Like other plants, Venus' Flytraps gather nutrients from gases in the air and nutrients in the soil. However, they live in poor soil and are healthier if they get nutrients from insects.
 The leaves of Venus' Flytrap open wide and on them are short, stiff hairs called trigger or sensitive hairs. When anything touches these hairs enough to bend them, the two lobes of the leaves snap shut trapping whatever is inside. The trap will shut in less than a second. The trap doesn't close all of the way at first. It is thought that it stays open for a few seconds in order to allow very small insects to escape because they wouldn't provide enough food. If the object isn't food, e.g., a stone, or a nut, the trap will reopen in about twelve hours and 'spit' it out.
4.  Venus fly traps, Pitcher plants, and Sundews all consume insects, but that's not how they get their energy. They still get their energy from the sun and transform it into food (such as sugars) using photosynthesis. They use the dead insects for their nutrients. We find the carnivorous plants in environments where there are very low levels of nutrients in the soil.

Sources:
1. https://simple.wikipedia.org/wiki/Energy
3. https://botany.org/bsa/misc/carn.html
4. http://scienceline.ucsb.edu/getkey.php?key=2653

There are so many types of energy that the list simply goes on!
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2) Yes, the Venus Fly Trap is similar to a Pitcher Plant. Both plants require energy to reproduce, respire  and capture their meals. They are still living things that require energy for life processes that are vital for their survival.
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3a) So why do they prey on unlucky creatures? The truth is, Venus Flytraps come from marshes where the soil is very acidic and minerals and other nutrients are scarce. The vast majority of plants could never survive in an environment like this because they would not get all the vitamins and nutrients and energy sources they need from the soil to grow.Despite their carnivorous ability to eat insects and arachnids, Venus Flytraps are still plants which means that they can still grow using photosynthesis, a process in which they take energy from sunlight and nutrients from air and soil .
 3b) The way they trap food is interesting as the plant has no eyes or nose to see or smell if there is an insect in its jaws. It does however have trigger hairs. When the unfortunate fly triggers a hair, the hair causes the cells to expand and snap shut the leaves, encasing the fly in its jaws. They attract their food via nectar. When the insect falls for the trap and enters the mouth, triggers a hair and is caught, something awesome happens!  If insect secretions, such as uric acid, stimulate the trap, it will clamp down further on the prey and form an airtight seal. Once the trap closes, the digestive glands that line the interior edge of the leaf secrete fluids that dissolve the soft parts of the prey, kill bacteria and fungi, and break down the insect with enzymes to extract the essential nutrients. These nutrients are absorbed into the leaf, and five to 12 days following capture, the trap will reopen to release the leftover exoskeleton. The same method of digestion is used in some types of insects.
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4) Yes, they have the same characteristics of a plant but the only difference is that it preys on other animals. Thus, people often confuse the Venus Flytrap to be an animal.

Potential energy is energy stored in an object. Chemical, mechanical, nuclear, gravitational and electrical are all stored energy. Kinetic energy does the work. Light, heat, motion and sound are examples of kinetic energy.

*Does the venus flytrap need energy?

They use the insects for nutrients like nitrogen and phosphorus. These atoms are the building blocks for proteins and other molecules. The plants break down the insects using enzymes, acids, and even little bacterial helpers. This is how we break down our food in our digestive systems. Then they absorb the broken-down molecules of their prey.

Carnivorous plants grow in places where there aren’t many nutrients in the soil. Bacteria in soil usually help break down dead plants and animals into molecules that other plants can use as fertilizer. In sandy places there isn’t much “dead stuff” in the soil. Venus fly traps do well in sandy soil.

How does it get its food?

 To get the nutrition it needs, the flytrap lures insects, including ants and flies, into the jaws of its trap. The trap's reddish interior and small nectar-secreting glands along its rim trick the insects into thinking they have found a flower, said Rainer Hedrich, a biophysicist at the University Wuerzburg in Germany. He and colleagues have revealed how hormones play a role in how the plant snaps up and digests its prey.