Humidity is a measure of the amount of moisture in the air. It also tells you if there is enough moisture to create clouds or rain.
Explanation:
If the amount of water vapor (or moisture) in the air increases, the humidity increases, and if the amount of water vapor in the air decreases, the humidity decreases.
The US sent Cuban mercenaries or spies to assassinate Fidel Castro with many failed attempts and to take over the Cuban government with someone who will benefit the US