You are presented with the question "What do radiators use to heat buildings?" and the following answer choices: 
- coal
 - CFCs
 - Solar power
 - Oil
 - Oxygen
 - hot
 - Hydrogen
 - fuse

Now knowing that energy is used for heating a building by a heating system and radiators are used to heat the building, The energy source is oil, choose the best answer.


 

    Oil     