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 am hesitating between 4 options to answer the following question, which option should I choose?
Question: A potential negative impact of building a dam on a river is that the dam
Possibilities:
- 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.

prevents sediment from flowing downstream.