1of 2 rivers in mesopotamia crucial t ok life

Mesopotamia was born between two rivers, the Tigris and Euphrates. Both were crucial for the life in civilization due to several reasons.

One is agriculture, as rivers provide water that's important for crops. Another one is drinking water and water used for hygiene. The third reason is the fact that there is always mud around rivers, which was used for building houses.

50% because no one is smart enough to relize that money makes the world go round and 99% of the earth hates donald trump the other 1% is the republicans go figure right

answer; i believe the answer is 80%, plz check first good luck;