the major ethnic and language groups in the country
Answer:
Agriculture yielded more food, which made denser human populations possible, thereby supporting city development. Farming led to dense, settled populations, and food surpluses that required storage and could facilitate trade. These conditions seem to be important prerequisites for city life.
The answer is C, due to the fact that the Area of a square is Base times Height, and the Area of a Circle is radius squared times pi.
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