interfering with the water cycle. decreasing the predator population. increasing the rate of algae growth. causing aquatic animals to grow larger.
I gave my students this multiple choice question: The excessive use of nitrogen-based fertilizers causes runoff that increases the nitrogen content of lakes and bays. These nitrogen compounds directly affect the aquatic ecosystems by

Only one answer is correct among these 4 choices:
- interfering with the water cycle.
- decreasing the predator population.
- increasing the rate of algae growth.
- causing aquatic animals to grow larger.

Could you tell me which one is correct?

increasing the rate of algae growth.