Fact 1: Water vapor cooling causes that water vapor to condense.

Fact 2: Heat energy is released as the water vapor in the air condenses.

Given the two facts above, answer the question "Water vapor cooling releases what?" with the following options: 
- heat energy
 - solar energy
 - gas
 - evaporation
 - loose soil
 - scattered light
 - acid
 - Greenhouse gases


 

 heat energy        