Coral reefs are home to a quarter of all marine species on Earth. What is one
consequence of decreased biodiversity in coral reefs?
O
A. More niches for land species
O
B. Reduced stability of all biomes
O
C. Increased number of predatory species
O
D. Loss of warm water swimming holes

A)    

A) makes more sense to me                                                                

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.