In a marine food web, which trophic level includes organisms that feed on primary producers?

• A. Osmosis
• B. Primary Producer
• C. Primary Consumer
• D. Scientific Name

Answer: (C)

The question tests how energy moves through a marine food web and who sits at the level that eats the energy source. Organisms that feed on primary producers (like phytoplankton and other autotrophs) are primary consumers. They obtain energy by consuming the producers, placing them one step up from the producers in the food chain.

Osmosis is a water movement process, not a feeding level. The primary producer itself is the energy source, not the consumer. The scientific name is just a label for the organism, not its role in the food web.