The correct answer is D) poor weather and natural disasters.
What had the greatest effect on ending the Florida land boom was poor weather and natural disasters.
People felt very attracted to get a portion of land in the Florida peninsula, the sunny days, the beach, and the great weather made Florida one of the best destinations for American people in the 1920s. That was called the "Florida Boom." This created cities such as Coral Gables, Holywood, Boca Raton, and Miami Shores. However, heavy storms, hurricanes, and the Great Depression of 1929 ended the "Florida dream."