The ancient civilizations of mesopotamia and egypt had which of the following in common?

The ancient civilizations of Mesopotamia and Egypt were both facilitated by rivers that ran in their midst. The Euphrates, Tigris, and the Nile deposited silt along riverbanks which made the adjoining land extremely fertile. This led to the development of cities like Ur and Eriku in Mesopotamia, and Thebes in ancient Egypt. In Egypt, the Nile served as a means of transportation and also provided protection from enemies because its marshy deltas made invasion almost impossible.

early settlements on the subcontinent. both the indus and the ganges rivers carried rich silt from the mountains to the plains. when the rivers flooded, the silt spread over the plains and made the soil in the river valleys fertile for farming.

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