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In this example, the organisms are benefitting each other by picking insects out of each other's fur. This is an example of Altruistic Behavior because some are "sacrificing" themselves for the benefit of others. Although "sacrificing" is an extreme term in this case, the monkey on the far left is not getting groomed like the other two, which is his sacrifice. However, in different examples, "sacrifice" can have a more fitting meaning, especially if an animal is killed by a predator while trying to warn the rest of its group.

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This is an example of altruistic behavior when the organisms are not the same species. This gray langur was found grooming a resting dog. It is shown that the langur is the altruist and the dog is the receiver. This is a case where the altruism is one way.

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This example shows how a parent interacts with their offspring. In this case, it is shown that they are both affectionate to each other, which means that this is a case where both are the altruists. They are also both the receivers.

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In this example, it is shown that a giraffe is grooming a small animal. This is an example of one way altruism because the small animal is the only one benefitting from this exchange.

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The characteristics of altruism are that it is potentially reciprocal, meaning that the receiver may give back in return. In turn with this, the altruistic behavior may benefit the altruist, not just the receiver. Altruism is also determined by the environment. This means that it can depend on the position of the individuals or groups in their environment. If the organisms are threatened, they will have a different type of altruism than if they are not threatened. For example, the example of the giraffe grooming the small rodent is a lot different than an organism "sacrificing" itself to warn its other group members if there's a predator.

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This behavior has become an adaptation because it allows organisms to work together in order to survive. Since an adaptation is anything that allows an animal to survive, this is a perfect example. For example, if an animal sacrifices itself to a predator while trying to warn its group, then it has increased the chance of the others' survival. In some cases, like the example shown in the picture, it benefits both the altruist and the receiver. They are all helping each other groom, which makes their life a bit easier. Overall, it goes against their natural instinct in some cases, like when they would usually run away from a predator, they would make themselves more visible to warn their group.

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Altruistic Behavior is an example of Social Behavior. Not only does Social Behavior allow organisms to work together and increase their chance of survival, but it allows them to pass on their traits to the next generation. The whole purpose of an organism's life is to survive and reproduce, which is something the Social Behavior helps.

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Darlington, P. J. (n.d.). "Altruism: Its Characteristics and Evolution." Retrieved from
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC411253/.

Atmosfera, J. (2011). "Altruism and the Evolution of Morality." Retrieved from http:
//filipinofreethinkers.org/2011/01/07/altruism-and-the-evolution-of-morality/.

Svoboda, E. (2017). "Can Microbes Encourage Altruism?" Retrieved from https:
//www.quantamagazine.org/can-microbes-encourage-altruism-20170629/.

Munteanu, N. (2017). "What Altruism in Animals Can Teach Us About Ourselves." Retrieved from http://sfgirl-thealiennextdoor.blogspot.com/2010/06/what-altruism-in-animals-can-teach-us.html.

Sinha, R. (2008). "Not Only Humans but Animals, Even Bacteria are Altruistic." Retrieved from http://originalwavelength.blogspot.com/2008/08/not-only-humans-but-animals-even.html.