Coral bleaching events are occurring in coral reefs around the world. which statement best describes how human activity will likely continue to cause a loss of reef biodiversity?

a. human activity is causing fish species the reefs depend on to decline.

b. human activity is releasing more carbon dioxide into the atmosphere.

c. human activity is significantly increasing the populations of sea mammals.

d. human activity is significantly increasing the populations of zooxanathelle.

i will give brainliest