Question

4. What is one possible reason that average water clarity decreased from

1990 to 2015?
A change in the amount of water.
Less deposits from runoff.
Eutrophication
A change in the amount of oxygen in the water.

Answer 1

[AI-generated answer — Bot GPT 3.5]

Eutrophication is one possible reason that average water clarity decreased from 1990 to 2015. Eutrophication occurs when excess nutrients like phosphorus and nitrogen enter a body of water, leading to an overgrowth of algae and other aquatic plants. These organisms can cloud the water and reduce visibility, ultimately decreasing water clarity.