Question

why is excess fertilizer bad for aquatic ecosystems? *
algal blooms are created which blocks out sunlight
without sunlight aquatic plants stop photosynthesis and dont produce oxygen
fish and other aquatic organisms are deprived of oxygen and die
all of the answer choices

Explanation:

Excess fertilizer causes algal blooms. Algal blooms block sunlight. Without sunlight, aquatic plants stop photosynthesis and don't produce oxygen. Fish and other aquatic organisms are deprived of oxygen and die. So all the given reasons are correct.

Answer:

All of the answer choices