Answer:
A. overfishing
Explanation:
A group of Australian and Canadian scientists found evidence that the decline of the shark population has a negative impact on Australian reefs With the disappearance of sharks, the number of small predatory species, such as emperor fish or silver breams, has increased , which feed, among others, on animals whose function is to clean the reefs from algae and allow the corals to regenerate. "Coral reefs face an uncertain future," and the only thing that can save them is to limit fishing in that territory.
