How did the Sumerians Egyptians and the people of the Harappan civilization make use of their environment?

The Sumerians utilized the Tigris and Euphrates rivers for irrigation, enabling agriculture in their arid environment, while also employing reeds for building materials and crafting boats. The Egyptians relied on the Nile River for fertile soil from annual floods, using it to support their agriculture and transportation. Meanwhile, the Harappan civilization benefited from the Indus River, which provided water for farming and trade, and they constructed advanced urban planning with drainage systems to manage their environment effectively. Each civilization adapted their agricultural practices, architecture, and trade routes to leverage their unique geographical resources.