The Coloumbian exchange was the exchange of species between the Old and the New continents. Because of this we can for example choose between cofee and cacao to drink: Cofee is from the Old, and Cacao from the new World. Similarly, if you've even eaten food that included tomatoes (New world) and rice (Old World) - this is only possible with Columbian exchange.
I am pretty sure it is c, i hope i helped
Answer:
1. Yes, social structures exist in school; for example, in the building itself the principal runs the school which means they must set rules that all students must follow. Below them, there are that administrators follow the principal and make sure those rules are not being broken. Then below them are teachers who teach the students of the rules that they cannot break.
2. The positive is that there is order in society such that if people follow rules then work will go by more simply without risk of something going wrong. The negative side is that people will take their high position too far and abuse their power. Because of this people may feel like they are being controlled.
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Answer:
C. What to produce, how to produce and who are you producting it for
