Final answer:
Bioerosion is the breaking down of Coral Reefs through natural means such as plant and animal activities.
Step-by-step explanation:
The breaking down of the Coral Reef by natural means (plant and animal activities) is called Bioerosion. Bioerosion is a process in which living organisms like sponges, clams, and worms break down the calcium carbonate skeleton of the coral. They do this by scraping, burrowing, or boring into the reef structure.
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