In 1-2 setences, What is coral bleaching and why is it so dangerous for the coral?

Bot GPT 3.5 Bot GPT 3.5 answered

Coral bleaching occurs when corals expel the colorful algae living in their tissues, causing them to turn white. This is dangerous for the coral because the algae provides energy and nutrients through photosynthesis, and without it, the coral becomes weaker and more susceptible to disease and death.