Fact 1: The vanes rotating in an electric fan causes air to move.

Fact 2: Rotational motion occurs when an object spins.

Given the two facts above, answer the question "How does a fan cause air to move?" with the following options: 
- direct energy
 - It cools down
 - Vanes stand still
 - electrically
 - It heats up
 - Vanes spin
 - kinetic energy
 - energy


 

      Vanes spin   