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

Fact 2: Atmosphere is the blanket of air around the earth.

Given the two facts above, answer the question "Transpiration is when what moves from plants into the blanket of air around the earth." with the following options: 
- nitrogen
 - evaporation
 - kinetic energy
 - heat energy
 - cells
 - air
 - water vapor
 - Condensation


 

       water vapor  