You are presented with the question "Solid materials used to produce electricity by burning in what need to be transported firs" and the following answer choices: 
- Conifers
 - animals
 - it needs them
 - humans
 - heat energy
 - important habitats
 - power stations
 - batteries

Now knowing that coal is used to produce electricity by burning in coal-fire power stations and solid refined coal is easy to transport and can be used in coal-burning equipment, choose the best answer.


 

       power stations  