the lake to dry up. algae to grow in the lake. the lake to become deeper. water in the lake to become solid.
I gave my students this multiple choice question: Runoff from farms that use fertilizers is entering a small lake. This will most directly affect the lake by causing

Only one answer is correct among these 4 choices:
- the lake to dry up.
- algae to grow in the lake.
- the lake to become deeper.
- water in the lake to become solid.

Could you tell me which one is correct?

algae to grow in the lake.