Climate change is causing the Earth to gradually increase in temperature, this is causing the warming waters.
Coral has this beneficial relationship with this algae called zooxanthellae. The coral provides a home where the algae provides some nutrients. Zooxanthellae uses photosynthesis to get its own food (It's not getting any inside a coral polyp!)
When there is an increased amount of sunlight there is more photosynthesis occuring, which means more and more algae.
To disprove C, the great barrier reef is KNOWN for its biodiversity. Theres LOTS goin' on down there.
