Final answer:
Key West is the location that is 90 miles from Cuba and it is known as the 'Conch Republic.' It is a popular tourist destination due to its proximity to Cuba and its position as the southernmost point of the continental U.S.
Step-by-step explanation:
The question is regarding which location is 90 miles from Cuba. The phrase "Conch Republic, Southern-most" is a reference to Key West, which is indeed roughly 90 miles away from Cuba and is known for its conch-style houses and as the southernmost point in the continental United States. The other options given, such as the Bahamas, Puerto Rico, and Jamaica, are not as close to Cuba.
Cuba is a significant island in the Caribbean region and is known for its rich history, stretching back to the colonial era when it was a colony of Spain. Today, Cuba is recognized for its tourism, offering some of the finest beaches and clear waters, making it an attractive tourist destination.