What was the most important factor in making Mesopotamia’s farmland fertile?

What was the most important factor in making Mesopotamia's farmland fertile? Floods on the Tigris and Euphrates rivers brought silt to the land. The fertile silt made the land ideal for farming.

Explanation:

*Screams in cave writings*

if a bill passes in the house of representatives, it goes through a similar process in the senate. before a bill becomes law, it must be approved by both chambers of the legislature. the bill must pass with the same wording in the house of representatives and the senate before it can go to the governor for approval.

the answer is the ku klux klan