How being able to create bricks might have affected the Early River Valley Civilizations.

Rivers were attractive locations for the first civilizations because they provided a steady supply of drinking water and made the land fertile for growing crops. Moreover, goods and people could be transported easily, and the people in these civilizations could fish and hunt the animals that came to drink water. . To provide water, they dug irrigation ditches that carried river water to their fields and allowed them to produce a surplus of crops. For defense, they built city walls with mud bricks.

It’s either d or b ! but it might be b

Ibelieve b) recall election