Question

which organisms are secondary consumers? check all that apply. kelp kelp crab sea otter sea urchin horn shark elephant seal

Explanation:

Producers make their own food (kelp is a producer). Primary consumers eat producers (kelp crab and sea urchin eat kelp). Secondary consumers eat primary consumers. Sea otter eats kelp crab, horn shark eats sea urchin, so they are secondary consumers. Elephant seal is a tertiary consumer as it eats horn - shark.

Answer:

sea otter, horn shark