15. The government decides what and how goods are produced A. command economy
B. market economy
C. traditional economy
D. mixed economy

(d) rivers.

explanation:

civilizations developed around rivers because their waters provided places to hunt and fish. also, as the rivers flooded, the lands around them became fertile. this allowed them to support farming. this is especially true of the nile river, which flooded the same time each year.

i believe it d) heterogeneous

china is shifting toward specialization in industry and services and away from agriculture.

explanation:

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