You are presented with the question "what can tidal energy be used to produce?" and the following answer choices: 
- Light passing through water
 - neutrons
 - moon
 - protons
 - rays or beams
 - electrons in motion
 - mechanical waves
 - objects that have mass

Now knowing that tidal energy can be used to produce electricity and electricity is electrons in motion, choose the best answer.


 

      electrons in motion   