Answer:
Bleaching occurs when the colorful algae that live inside the corals are expelled. That can happen for a lot of reasons — because the water is too warm or too cold, or because of extreme low tides. But bleaching is really bad for coral reefs, because the algae are essentially its farms, providing about 90 percent of the coral’s energy. Without it, the coral goes white as it starves. Since the 1980s, the world’s coral reefs have experienced three significant mass bleachings.
Explanation:
