The working Thesis

Thesis: Global Warming is a big issue and the Coral Reefs are going to get hit the worst, first.

For Ethos I can say that if the coral start to bleach then they are dying but have a chance to recover, but at the rate it is now, there is very little hope for that.
For pathos I can use that if these wonderful and colorful organisms of nature die. Many exotic fish and coarl will disappear and people will not be able to view these spectacular organisms.
For Logos I could use that if these coral die, then many people in the States will not have the seafood that the reefs were supplying.