Aconvention is best described as a. a formal meeting of delegates and representatives b. a formal event to raise money c. a formal revision made to a government d. a formal change made to a constitution

The answer is A a formal meeting of delagetes and representitives I know cause i took the test

(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.

would not cooperate with each other voluntarily.