You are presented with the question "what moves because of vanes rotating in an electric fan?" and the following answer choices: 
- nitrogen and oxygen
 - sun rays
 - microwaves
 - some mammals
 - living things
 - animals with backbones
 - kinetic energy
 - neutrons

Now knowing that the vanes rotating in an electric fan causes air to move and air is mostly nitrogen and oxygen, choose the best answer.


 

 nitrogen and oxygen        