In the late 1800s, people in many parts of the world decided to leave their homes and immigrate to the United States. Fleeing crop failure, land and job shortages, rising taxes, and famine, many came to the U. S. because it was perceived as the land of economic opportunity.
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True, they trade for items that they don’t have or have access to. They also do redundancy trading in case of crop failure. Trading also increases the bonds between two tribes.
Hope you learned something new!! ^v^