Subsistence agriculture is a self-sufficiency farming system in which the farmers focus on growing enough food to feed themselves and their entire families.A cash crop or profit crop is an agricultural crop which is grown for sale to return a profit. It is typically purchased by parties separate from a farm.
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Its D because it is way overpopulated in china
Answer:
At his death eleven years later, Alexander ruled the largest empire of the ancient world. His victory at the battle of Gaugamela on the Persian plains was a decisive conquest that insured the defeat of his Persian rival King Darius III.