Fertilizer runoff has a negative impact on aquatic ecosystems because .
A)
aquatic ecosystems do not require additional watering for survival
B)
phosphorus is not found in nature
C)
phosphorus is poisonous to living organisms
D)
living organisms do not require phosphorus in order to survive
E)
it causes plants and algae to grow quickly, suffocating organisms in the water

A.

Explanation:

it causes plants and algae to grow quickly, suffocating organisms in the water. ... phosphorus is poisonous to living organisms.

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E

Explanation:

When nitrogen and phosphorus from fertilizer are carried in runoff to lakes and oceans, they can cause eutrophication, the overgrowth of algae. The algae may deplete oxygen from the water and create a dead zone.

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