What is meant by a hypothesis? a. a natural phenomenon that requires explanation b. an explanation for a phenomenon that makes a prediction c. a tentative understanding of a natural phenomenon d. a pseudoscientific idea e. a historical theory that has been proved inaccurate?

A. A natural phenomenon that requires explanation

I would also say the answer is:

a. a natural phenomenon that requires explanation

Hope that helps :P

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 !