Fact 1: Temperature falls from the equator to the poles.

Fact 2: All temperatures are in Fahrenheit.

Given the two facts above, answer the question "what falls from the equator to the poles?" with the following options: 
- heat energy
 - kinetic energy
 - refraction
 - water vapor
 - Energy
 - h2o
 - density
 - Fahrenheit


 

        Fahrenheit 