You are presented with the question "What do electric fans cool?" and the following answer choices: 
- energy
 - kinetic energy
 - Human skin
 - sensory neurons
 - an object
 - deuterostomes
 - heat energy
 - the skin

Now knowing that the vanes rotating in an electric fan causes air to move and air speed is an important contributor to cooling of skin temperature, choose the best answer.


 

   Human skin      