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 is transformed through extreme heat and pressure over time among the following options:
- corn
 - coal
 - Gases
 - moss
 - potash
 - oil
 - matter
 - energy


 

    moss     