Question

the event that started the migration of many cubans to florida was
a severe drought.
the cuban missile crisis.
the cuban revolution.
a destructive hurricane.

Explanation:

The Cuban Revolution led to significant political and social changes in Cuba. Many Cubans, especially those with different political views or fearing the new regime, migrated. The Cuban Missile Crisis was a short - term tense event mainly about nuclear weapons. A severe drought or a destructive hurricane are natural disasters which are not the main long - term causes of large - scale Cuban migration to Florida.

Answer:

the Cuban Revolution.