The correct answer is B) Mountains protected the region from invaders and D) Rivers flooded, providing fertile soil and water for irrigation.
<em>Mesopotamian geography contributed to the development of complex civilizations like Sumer in that Mountains protected the region from invaders and Rivers flooded, providing fertile soil and water for irrigation.</em>
Sumeria-Mesopotamia was one of the oldest, if not the oldest civilizations on planet Earth. The Sumerians established between two important rivers: the Tigris and Euphrates. They lived in this fertile region for 2000 years. Historians considered that Sumerians lived in that area in 4500 BC. The most important city-states of Sumer were Uruk, Nippur, Eridu, Lagash, Kish, and Ur. So it's true, Mesopotamian geography contributed to the development of complex civilizations like Sumer in that Mountains protected the region from invaders and Rivers flooded, providing fertile soil and water for irrigation.
