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Answer: C. Women first learned to save seeds from grains and sow them for the next harvest.
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The correct option is A. Farmers relied mostly on rainfall to water large crops is true of the development of farming in Sumer.
Farmers in Sumer struggled to cultivate crops because they either had too much water or not enough. They lacked the means to regulate the water supply. The Sumerians built an irrigation system as a solution to manage the water supply.
What was the key to successful farming in Sumer?
They needed the means to manage the water so they could have a consistent water supply throughout the year in order to be successful at growing food. As a result, Sumerian farmers started developing irrigation systems to supply their fields with water. In order to stop flooding, they constructed earthen walls along the river's sides known as levees.
A Mesopotamian relief illustrating the value of rivers for agriculture. The Sumerians discovered how to gather and channel the Tigris and Euphrates rivers' overflow, together with the rich silt it contained, and then use it to water and fertilize their agricultural fields.
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