What is the immediate effect of excess nutrients entering a body of water as runoff pollution?

Question

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Excess nutrients entering a body of water as runoff pollution causes an increase in algal blooms as they feed on the excess nutrients. This can lead to problems such as decreased dissolved oxygen levels, which can harm aquatic life.

Answer: A
 Excess nutrients entering a body of water as runoff pollution causes an increase in algal blooms, which can decrease the amount of sunlight reaching underwater plants. This can harm aquatic ecosystems as plants are essential to the food chain and oxygen production.

Answer: E
 Excess nutrients entering a body of water as runoff pollution causes an increase in algal blooms. When these algae die, bacteria that feed on them consume dissolved oxygen in the water, leading to decreased levels of dissolved oxygen. This can harm aquatic life that rely on oxygen, such as fish.

What Is the Immediate Effect of Excess Nutrients Entering a Body