Read, read, read, and take good notes:
http://www.google.com/search?q=importance+of+amazon+basin&oq=importance+of+amazon+basin&aqs=chrome..69i57.5218j0j7&sourceid=chrome&es_sm=119&ie=UTF-8
Let us know what you discover.
why is the amazon basin ecologically so important
2 answers
i guess it is cuz it is d largest river basin in d world