Answer:
B. pollution
Explanation:
Eutrophication is the process by which a body of water becomes enriched with excess nutrients, particularly phosphorus and nitrogen, leading to overgrowth of algae and aquatic plants. As these plants die and decompose, the process consumes oxygen in the water, leading to hypoxia (low oxygen conditions), which can harm aquatic organisms, including fish.
Human activities such as agricultural runoff, industrial discharges, and the use of fertilizers accelerate eutrophication by introducing elevated levels of nutrients into water bodies. Therefore, the most appropriate answer choice is:
- B) Eutrophication is caused by pollution.
