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

Fact 2: WIND Wind is the movement of atmospheric air on a planet.

Given the two facts above, answer the question "Uneven heating of Earth's surface causes the movement of what?" with the following options: 
- Earth's core
 - underground air
 - electromagnetic energy
 - atmospheric air
 - Earth's moon
 - Greenhouse gases
 - kinetic energy
 - an object


 

    atmospheric air     