Final answer:
Henry Flagler helped Florida grow and attract tourists by developing the Florida East Coast Railway and investing in hotels and resorts, which transformed the state into a desirable destination.
Step-by-step explanation:
Among the options provided, Henry Flagler played a significant role in helping Florida grow and attract tourists. Henry Flagler was an industrialist and a founder of Standard Oil, who played a key role in the development of the Atlantic coast of Florida. He built the Florida East Coast Railway, which extended to Miami and, eventually, to Key West, opening up the state for tourism and commerce. His investments in grand hotels and resorts transformed Florida into a prime destination for travelers in the late 19th and early 20th centuries.