Choose the correct option:

The bacteria forming blooms in polluted water bodies are ________.

The bacteria forming blooms in polluted water bodies are photosynthetic autotrophs. E.g., Cyanobacteria. The algal blooms appear in waterbodies when water is rich in nutrients like nitrogen and phosphorus.

Chemosynthetic autotrophs synthesise their food from inorganic compounds in their environment.

Heterotrophs are those organisms that depends on autotrophs for their nutrition.

Saprophytes derive their nutrition from dead decaying organic matter.