You are presented with the question "What kind of power stations create most of the electricity in the United States?" and the following answer choices: 
- coal
 - making
 - motors
 - energy
 - cars
 - made
 - heat
 - two

Now knowing that coal is used to produce electricity by burning in coal-fire power stations and most of the electricity in the United States is produced by burning coal, choose the best answer.


 

 coal        