Final answer:
The Tigris and Euphrates Rivers are part of the Fertile Crescent, an early area of human civilization in North Africa and Southwest Asia, facilitating agricultural development and city establishment.
Explanation:
The Tigris and Euphrates Rivers are part of the Fertile Crescent, an early area of human civilization in North Africa and Southwest Asia. These rivers provided large amounts of freshwater, facilitating agricultural production and the development of early civilizations. Settlements like Uruk, Eridu, and Ur were established in Lower Mesopotamia due to the fertile soils near the rivers.
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