what role did the tigris and euphrates rivers play in the development civilization

Athey enriched the soil and helped farmers grow supplies surpluses.
Bthey enabled the people of mesopotamia to become sea traders.
Cthey provided enough water for farmers not to have to irrgate their crops.
Dthey isolated the people of mesopotamia from other religions.

Verified Answer :

A- they enriched the soil and helped farmers grow supplies surpluses.

The river enriched the soil, which made Meso a suitable place for farming

The correct answer is A. They enriched the soil and helped farmers grow supplies surpluses.

Explanation:

The Tigris and Euphrates are two rivers located in a zone that is called the Fertile Crescent in which the first civilization developed. This can be explained as the existence of this river in this area made the soil rich and therefore it was easier to grow different crops, also the water of the river was used to irrigate crops through canals, which allow people to stay in one area and become a civilization rather than being nomads and  created supplies surpluses that made people able to develop a culture and later trade products in land or through the river. Therefore, the role the Tigris and Euphrates river played in the development of civilization is that they enriched the soil and helped farmers grow supplies surpluses.