What is the most productive farming area in the region? dasht-e kavir dasht-e lut fertile crescent jordan rift valley

I believe the answer is: Fertile Crescent

Fertile Crescent is a term that used to described a region where human civilizations could thrive due to its capability to sustain many agricultural products. In most cases, this region possess both soil with high amount of nutrients and located not far from a water source.

- "made the south's economy grow rapidly and a small effect that a lot of people don't know is that it made the more demand of slaves and cotton products. and also new states formed due to plantations growing in size."

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where is the picture