Fact 1: Water vapor condensing in clouds causes rain.

Fact 2: Humidity is the amount of water vapor in the air.

Given the two facts above, answer the question "condensation in the air and humidity are caused by?" with the following options: 
- Sun
 - kinetic
 - heat
 - Joules
 - climate
 - sweat
 - boiling
 - water


 

        water 