The answer is: 1) "Economists study the processes of the human mind."
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Answer:
Since Indian tribes living there appeared to be the main obstacle to westward expansion, white settlers petitioned the federal government to remove them. ... Under this kind of pressure, Native American tribes—specifically the Creek, Cherokee, Chickasaw, and Choctaw—realized that they could not defeat the Americans in war.
Explanation:
In simpler terms, the Native American tribes did not want to give up their land and America wanted to keep expanding ultimately into Native American land.
I believe the answer is: They are based on the arbitrary borders of old European empires
African continent was colonized by different european empire. To avoid conflicts among the european, they divided africa into several territories and dtermine which country has the jurisdiction over each territories. After African nations gained independence, they still use this separation as borders to differentiate one country with another.
