prevents sediment from flowing downstream. increases the amount of water available to farms. prevents seasonal downstream flooding. increases the rate of water loss from a lake.
I gave my students this multiple choice question: A potential negative impact of building a dam on a river is that the dam

Only one answer is correct among these 4 choices:
- prevents sediment from flowing downstream.
- increases the amount of water available to farms.
- prevents seasonal downstream flooding.
- increases the rate of water loss from a lake.

Could you tell me which one is correct?

prevents sediment from flowing downstream.