Question

question 8 (1 point)
healthy and abundant kelp forests depend to a large extent on ________.
○ healthy populations of sea otters.
○ freshwater runoff from land.
○ healthy populations of sea urchins.
○ all of the above
○ strong wave action to keep their fronds suspended.

Explanation:

Sea otters are keystone species that prey on sea urchins, which feed on kelp. Healthy sea otter populations control sea urchin numbers, preventing overgrazing of kelp. Freshwater runoff and strong waves are not primary dependencies, and too many sea urchins harm kelp.

Answer:

healthy populations of sea otters.