The presence of altruistic behavior is most likely due to kin selection, a theory maintaining that A) genes enhance survival of copies of themselves by directing organisms to assist others who share those genes
Altruism is the altruistic caring for others—doing things only out of a desire to help rather than because of a sense of duty, loyalty, or religious obligation. It necessitates acting with consideration for the welfare of others.
Some of these altruistic deeds need risking one's own safety in order to aid others. Such deeds are often carried out selflessly and without thought of reward. Other forms of reciprocal altruism entail helping others with the expectation that they would do the same for you.
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