1. to convince readers that practices that destroy coral reefs must be stopped AND 3.to inform readers about how the coral reefs are being destroyed
The author's purpose of "Save the Coral Reefs" is both to inform and to convince. In order for the author to convince readers that practices that destroy the reefs must be stopped, the author almost must inform the reader what these practices are. Since the question allows you to choose more than one, these are the two best answers. Even though the author does talk about scuba diving and fishing companies, these are not his purpose for writing "Save the Coral Reefs".
