The correct answer is Cuba. To find the largest island in the Caribbean Sea, you can use various methods. One way is to consult a reliable source such as an encyclopedia, textbook, or the internet. Another method is to compare the sizes of different islands by looking up their land areas. In this case, you could search for the land area of Jamaica, Florida, Cuba, and Costa Rica and compare them. By doing so, you would find that Cuba has the largest land area among these options, making it the correct answer.
