You are presented with the question "What does being buried under mud and soil change peat into?" and the following answer choices: 
- potash
 - fuel
 - elms
 - mate
 - magic
 - fields
 - peat
 - bamboo

Now knowing that being burried under soil and mud changes peat into coal through extreme heat and pressure in a swamp over a long period of time and marble is used for sculptures, and coal is used for fuel and energy like light, choose the best answer.


 

  fuel       