Hello there!
Mesopotamia was a great place for farming because the Tigris and Euphrates rivers allow the people to get rich fertilized soil, which made it great for farming.
There are two main rivers/river systems in Mesopotamia, and those were the Tigris and Euphrates rivers.
The rivers were connected to the civilizations agriculture, in which fertilized the soil for them to plant things.
The civilizations agriculture were right next to the rivers so they can have easy access to it. Planting crops right next to the rivers allowed them to fertilize the soil without putting any extra work into it. The water was like a barrier around the crops to keep the soil rich.
I hope this helps!
Best regards,
MasterInvestor