Explanation
Algal bloom results in (C) eutrophication.
Algal blooms occur when there is an excessive growth of algae in aquatic environments, often due to high nutrient levels, particularly nitrogen and phosphorus. Eutrophication refers to the process where excessive nutrients in water bodies lead to increased algal growth. The rapid proliferation of algae during an algal bloom can deplete oxygen levels in the water, causing harm to aquatic organisms and disrupting the ecosystem balance. This process of eutrophication can have detrimental effects on water quality, biodiversity, and overall ecosystem health.