What happened on the fourth of july to make it an important us holiday? a) the american revolution ended. b) george washington became president. c) the pilgrims landed at plymouth rocke d) the declaration of independence was signed.

d

Explanation:

tye declaration of Independence was signed

(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.

what are the issues?