Fact 1: Wind is used for producing electricity.

Fact 2: Wind is air in motion.

Given the two facts above, answer the question "what is used for producing electricity?" with the following options: 
- chemical reaction
 - hydrogen and oxygen
 - boiling oxygen
 - air in motion
 - kinetic energy
 - a hydraulic system
 - condensing water
 - clouds


 

    air in motion     