Many fossils are buried inside the canyon wall. What do you think scientists can infer from the rock layer in which a fossil is found? Construct an explanation to support your answer.

(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.

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it should be a. song dynasty’s civil service examination system created an administrative bureaucracy manned by the landed aristocracy.