In reference to the organisms named and pictured above, which add oxygen to the ocean ecosystem? Select ALL that apply:

Question

Group of answer choices

kelp

kelp crab

sea urchins

sea otters

horn sharks

northern elephant seals

Answer 1

In the context of organisms that add oxygen to the ocean ecosystem, the primary contributors would be those that photosynthesize. Among the options provided, the organism that contributes to oxygen production in the ocean ecosystem is:

• kelp (as it is a type of seaweed that photosynthesizes and produces oxygen)

The other organisms listed (kelp crab, sea urchins, sea otters, horn sharks, northern elephant seals) do not contribute to oxygen production in the way that kelp does. They either consume oxygen or are involved in different ecological roles.

So, the correct answer is:

• kelp