According to the map, why were the civilizations of mesopotamia able to thrive in the arabian desert?

They were near the Tigris and Euphrates River.

Explanation:

I've taken this test before lol, i think this is the answer. Sorry if its wrong :(

the decreasing neutrality of the u. s. in world war i

hope this : )

c. troops marched forward in close formation against newer, more accurate weapons