This united states ship lost more than four fifths of its crew when it sank in pearl harbor.

(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.

answer; the period of time known as the middle ages;