Question

unit exam - biomes
which animal in the blue food chain is a tertiary consumer?
the tuna fish
the crabs
the producers

Explanation:

In a food chain, producers are at the base (like plants or algae). Primary consumers eat producers. Secondary consumers eat primary consumers. Tertiary consumers eat secondary consumers. In the blue food chain, the tuna fish is at a higher trophic level (eats other consumers that are one level below it in the chain), while crabs are likely secondary consumers (eating primary consumers like small organisms in the water), and producers are the starting point of the food chain (not consumers). So the tuna fish is the tertiary consumer.

Answer:

the tuna fish