Slavery was prohibited north of the ohio river.
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false

Yes, this is true.

This river was known as the place dividing the slave territory in the south and the slave-free territory in the north and many slaves from the south used it to escape to the north.
It was the southern boundary of three slave-free states: Ohio, Indiana and Illinois.

Ais the correct answer

To solve their problems, mesopotamians used irrigation, a way of supplying water to an area of land. to irrigate their land, they dug out large storafe basins to hold water supplies these ditches brought water to the feilds. to protect their feilds from flooding, farmers built up the banks of the tigris and euphrates.hope ths !