The Agricultural revolution did what?

Explanation:

The Agricultural Revolution was phenomenal once in an agricultural generation in Britain due to increases in labour and land productivity between the mid-17th and late 19th centuries. ... Fallow land was about 20% of the arable region in England in 1700 before turnips and clover were extensively ripened.

(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.