What would be an example of a food chain in the giant kelp forest ecosystem?

In kelp forests, seaweeds known as giant kelp provide shelter and food for an entire ecosystem. Sea urchins are powerful primary consumers in kelp forests. ... In the kelp forest, sea otters are secondary consumers that hunt sea urchins. Tertiary consumers eat the secondary consumers and are at the fourth trophic level.

answer: the answer is b