How did the flooding of the Tigris and Euphrates contribute to the development of the
Sumerian civilization?

How did the irrigation of the Tigris and Euphrates rivers contribute to the development of this region? It allowed farmers to grow a surplus of wheat and barley which could be stored. The ability to store surplus food allowed populations to increase and civilization to develop.

Explanation:

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answer; first blank(1); 30% two(2); salmonella; i believe this is correct; //good luck;