Question

multiple - choice question
what is eutrophication?
the process by which soil dwelling bacteria fix nitrogen into a form we can use.
nitrates and nitrites leach into water and cause an abundance of algae ultimately causing a reduction of oxygen.
rewatch

Explanation:

Eutrophication occurs when excess nutrients (like nitrates and nitrites) enter water bodies. This leads to excessive algae growth. As the algae die and decompose, oxygen levels in the water are depleted. The first option describes nitrogen - fixation by bacteria, which is a different process.

Answer:

Nitrates and nitrites leach into water and cause an abundance of algae ultimately causing a reduction of oxygen.