You are presented with the question "What changes into coal when buried under soil and mud?" and the following answer choices: 
- rocks
 - sun
 - animals
 - cellulose
 - moon
 - plants
 - Newton
 - tunicates

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 dead plants provide peat moss, choose the best answer.


 

      plants   