Question

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

Explanation:

Tertiary consumers are at the fourth trophic level. Producers are at the first level. Crabs are likely secondary consumers (if they eat primary consumers like small herbivores). Tuna fish, which often eat secondary consumers (like smaller fish that ate crabs or other secondary - level organisms), fit the role of tertiary consumers.

Answer:

the tuna fish