Refer to the Newsela article "Climate Change in Hawaii and U.S. Tropical Islands." What is the author's purpose in mentioning the economies of the islands?

to explain that the cost of fish will be lower on islands

to suggest that islanders will look to other industries for develop income

to suggest that climate change will generate millions of dollars in tourism

to explain that climate change will affect tourism, a major source of income for islanders
(need real answers in the middle of a test and im stuck ill promise the first person to answer a brainiest award thing )