You are presented with the question "What is burning ethanol used to produce?" and the following answer choices: 
- heat energy
 - rays or beams
 - adding heat
 - kinetic energy
 - energy
 - carbon dioxide
 - electricity
 - engines

Now knowing that biofuel is used to produce electricity by burning and ethanol is the most widely used biofuel today, choose the best answer.


 

       electricity  