Fact 1: Transpiration is when water vapor moves from plants into the atmosphere.

Fact 2: An example of water vapor is steam.

Given the two facts above, answer the question "Transpiration is when _  moves from plants into the atmosphere" with the following options: 
- boiling
 - steam
 - rain
 - liquid
 - energy
 - cooled
 - gas
 - spring


 

  steam       