Being burried under soil and mud changes vegetation into peat through extreme heat and pressure in a swamp over a long period of time, and after a long time, the moss can form into a peat. Given these facts, what forms into peat through extreme heat and pressure over time among the following options:
- bamboo
 - desiccation
 - burrs
 - elms
 - moss
 - coal
 - candy
 - meat


 

     moss    