In mesopotamia, flooded rivers were filled with fertile soil called blank . to control floods, the mesopotamians built canals that regulated the flow of water from the source to the fields. this system of canals was a type of blank

How does rain water cause erosion and deposition? a. when acidic water soaks into the ground, water dissolves limestone, resulting in the formation of caves.b. when a river overflows it moves downhill resulting in the formation of caves.c. when it rains, water flows into rivers and streams and moves back to land, resulting in the formation of caves.d. when water empties into lakes, sediment is deposited, resulting in formation of caves.