Refutation 2: further more, mouse has the nearest biological  to human body , so researchers can use it instead of exposing  human to danger. ( Does your topic sentence say anything about a mouse.  If not you cannot introduce mouse here.  What argument was stated in the topic sentence.  You need specific sentences to support that.)

On the other hand, some people believe that online learning is more effective than face to face learning. They argue that , student can save transportation money and the time .Moreover, student can start learning in any time of the day and in any places, whether its bed room or garden or balcony.In reality, student might be distracted by a number of factors while studying online.,
Very good argument

They argue that online learning make lack of social interaction.

In fact, it is the same as face to face learning, you are socializing but from distance, you can open the microphone  and camera for clear body language to interact together.

Furthermore, some say that online learning reduces students productivity.

Actually, students get more productive when they are comfortable, online learning is very helpful to get more things done while you are at home and comfortable at the same time.
Good arguments.   Too many grammatical errors though.

On the other hand , other people believe that  (Generation ) are not the best people to lead the Qatar's future (this is not the question asked) to economic success. They argue that young people will not work harder as their parents. In fact, they young  Qataris are active and energetic to work in long hours in confidence . Moreover, (Generation Z) can create ideas greater than parents to be successful ⁱⁿ economically which it encourage them to achieve plans.
ok Arguments. Watch your grammar and vocabulary.

Transition word needed to introduce the second refutation. You must give the reader a sign post that you are moving to another point. Over the years, human testing has improved their ethics and society should start accepting them as they have safety standards that do not put the health of the human subject in danger. And for those who argue that human testing is unethical. Actually, there is a theory that is called utilitarianism that states that something or an action is moral or good when it produces the greatest amount of good for the greatest number of people. Based on this theory, volunteering for vaccine test is an ethical action which will save a lot of lives.

Good argument but too many grammatical and punctuation error takes away from easily understanding your content.

Many people are against providing free transportation because there are many people who would lose their jobs and companies would not be expected to provide top services. 

In fact, they would need more public transport workers with increased and better public transport.

Furthermore,a lot of public transport companies are reliable and need more customers.
Ok  this is correct.

Bp3: On the other hand, some people believe that the researchers have to skip animal testing to find cure for covid -19 and go straight to human testing. They argue that animal testing will take a long time and skipping it could save lives. In fact, going straight on testing animals. This is not a complete sentence Indeed, doing experiments on humans without going to the animal may not lead to wasting many people's lives and finding a quick cure. In addition, many people think that trying (you are not talking about peoples thoughts here.  At this time you are now talking about/suporting your own argument) medicine on humane straight will not wast time on the animal with less cost and fast results.

 

However, nether pollution or traffic will be reduced, because its only transfer pressure to public transportation and that will probably increase the pollution.  In order to provide more taxi cabs and busses to cover the demands.

 

In addition, delay in stations will become a regular situation, because of the amount of people who wants to benefit the decision and saving money.

 

They argue that it can assist the community by providing the equality among society members. 

 

Even though, labors are representing the majority that uses public transportation, equality may sound good but, it will need a lot more than free public transportation to reach it.

 

In detail, everybody will be able to use metro, taxi cabs and buses without a good reason except that it’s for everyone, that will raise the sexual harassment in public transportation among females, including staring, winking, groping, pinching, and sexual comments.