Final answer:
Controlling rivers to provide irrigation was the geographic factor that contributed to the development of Mesopotamia.
The answer is option ⇒a
Step-by-step explanation:
The geographic factor that contributed to the development of Mesopotamia is controlling rivers to provide irrigation. The Tigris and Euphrates rivers in the region were highly unpredictable and prone to periodic flooding.
The inhabitants of Mesopotamia realized that they needed to work together to build levees, canals, and d`ikes to protect against floods and ensure a regular water supply for farming. This led to the development of extensive irrigation systems, which allowed for the growth of urban centers and the success of cities like Ur, Babylon, and Nineveh.
The answer is option ⇒a