Question

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

Explanation:

In a food chain, producers (like plants/algae) make their own food. Primary consumers eat producers, secondary eat primary, tertiary eat secondary. Tuna fish are higher - level consumers, often tertiary in marine food chains (e.g., if crabs are secondary consumers, tuna eating crabs would be tertiary). Crabs are usually primary or secondary. Producers aren't consumers.

Answer:

B. the tuna fish