Answer :
It's A
Irrigation was overused, the soil didn't get any rest (crop rotation is a younger invention), the result was salinization of the soil, which led to decline of Sumer.
Irrigation was overused, the soil didn't get any rest (crop rotation is a younger invention), the result was salinization of the soil, which led to decline of Sumer.
Answer:
Irrigation of the crops led to salinization of the soil.
Sumer was located on a flat plain that provided no natural barriers to invasion.
Explanation:
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