thank you praige321 this really helped with the first question. But you need more details. I am not trying to be your teacher or bossing you around. I am just trying to help you.

Based on this article, I think that global warming may be causing coral bleaching because hot water and sunlight causes coral bleaching and the world is getting sunnier because of global warming, which might be making more hot water for coral to get bleached with. Do you agree?

Why are coral reefs important (a) for the environment (b) for the global economy? Answer: Coral Reefs provide food and shelter for small undersea creatures

I think the biggest advantage is that coral reefs protect small and little creatures.

I love this it's very interesting <3