Question

________ are microscopic plants that live in the water column of oceans, seas, and bodies of fresh water and are the foundation of the marine food chain.

○ zooplankton

○ phytoplankton

○ marine snow

○ blooms

Explanation:

To solve this, we analyze each option:

• Zooplankton are animal - like plankton, not plants.
• Phytoplankton are microscopic plants (they perform photosynthesis) that live in water columns and form the base of the marine food chain.
• Marine snow consists of organic matter and debris, not plants.
• Blooms refer to a rapid increase in plankton (usually phytoplankton), but the term itself is not the name of the microscopic plants.

Answer:

B. phytoplankton