Which readily available water resource was crucial to the development of Mesopotamia

Tigris and Euphrates are the readily available water resources that was crucial for the development of Mesopotamia

Explanation:

The region in the south west Asia Mesopotamia was a fertile plain and it was surrounded by mountains, plains and rivers. The rivers in this region provided the route to travel and the two rivers Tigris and Euphrates was very much needed to the development of Mesopotamia.

They made arrangements such that they can drain the water for irrigation from the water sources which were readily available. These rivers form many tributaries and they irrigate the fertile plains and provide water for agricultural purpose.