The invention of new ways of irrigation had the BIGGEST impact in ancient Egypt on?

Irrigation allowed the Egyptians to use the Nile's waters for a variety of purposes. Notably, irrigation granted them greater control over their agricultural practices. Floodwaters were diverted away from certain areas, such as cities and gardens, to keep them from flooding.

Explanation:

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these civilizations were located around fertile rivers, where they could produce an abundance of crops