Question

Grass is to erosion as a dam is to

Answer 1

believe the answer is: Flood

The thing that connected grass and erosion is that the existence of grass would PREVENT erosion because grass strengthen the soil composition on top of it. Dam is created in order to direct flowing water from rain into a space provided especially to store it, which will PREVENT flood.

Answer 2

The correct answer should be flowing water

Grass prevents erosion and dams prevent water from flowing.