Question

in this trophic pyramid, the secondary consumers are _.

Explanation:

• Phytoplankton are producers (first trophic level).
• Crustaceans eat phytoplankton, so they are primary consumers (second trophic level).
• Herrings eat crustaceans, making them secondary consumers (third trophic level).
• Mackerels eat herrings (tertiary consumers - fourth trophic level).
• Sharks eat mackerels (quaternary consumers - fifth trophic level).

Answer:

Herrings