Fact 1: Coal is used to produce electricity by burning in coal-fire power stations.

Fact 2: Electricity is a form of energy.

Given the two facts above, answer the question "What does burning coal in coal-fired power plants produce?" with the following options: 
- Decibels
 - Fireplaces.
 - engines
 - organisms
 - Aloe plants.
 - Banana plants.
 - Energy.
 - warmth


 

       Energy.  