You are presented with the question "What can be used to produce electricity?" and the following answer choices: 
- Something that generates electricity
 - an automobile engine
 - The bending of a ray of light
 - Something caused by pressure differences
 - that material's properties
 - energy of moving objects
 - series of enzyme-mediated reactions
 - Faulting of rocks in the crust

Now knowing that wind is used for producing electricity and wind is caused because of pressure differences in the atmosphere, choose the best answer.


 

    Something caused by pressure differences     