Answer: Adapted to it's environment in a different way.
Explanation:
The development of human culture is linked to the geographical environment in which they live. This evolutionary aspect allows the human race to adapt to different environments over time and around the world.
The geography in North America is very diverse; from the great plains to swampy areas, and great mountains, they allowed very diverse cultures to develop throughout America.
These cultures are different because they adapted to their environment, and also because of the geographical separation in which they developed.
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