Tell me how farmers watered their crops in Mesopotamia.

To irrigate their land, they dug out large storage basins to hold water supplies. Then they dug canals, human-made waterways,that connected these basins to a network of ditches. These ditches brought water to the fields. To protect their fields from flooding, farmers built up the banks of the Tigris and Euphrates

Explanation:

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a polymer is a chainlike molecule made up of small molecular units. these small molecular units are called monomers. monomers of polymer can be joined together either naturally or synthetically.