Fact 1: Uneven heating of the Earth 's surface cause wind.

Fact 2: Wind is air that is moving.

Given the two facts above, answer the question "what does uneven heating of Earth's surface cause?" with the following options: 
- kinetic energy
 - global warming
 - erosion
 - moving air
 - sweating
 - contamination
 - to move people
 - flooding


 

    moving air     