In biology organisms of the same species live within the same living habitats. They share the same needs and do not shun those who live in their habitats. Most organisms live with an understanding that working together will ensure survival. That is the understanding that if one were to exclude themselves from their pack then one would have a lower survival rate then with their pack. Humans go through their daily lives with the key intention of living for themselves. A study done by the American journal of human biology studied why humans migrate from where they initially lived. They found that humans immigrate in order to move from more rural habitats that
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