One major biotic factor that affects the health of coral reefs is/are?

The biotic factors of a coral reef include animals, coral, plants and some forms of bacteria. These biotic factors cover a spread of many different species. Like many other systems in nature, coral reefs require this diversity of life in order to maintain stability in their populations. There is some interplay of biotic and abiotic factors in a coral reef.

This is the most closely resembles the model.