You are presented with the question "Being buried under soil and mud changes what into bogs through extreme pressure and heat?" and the following answer choices: 
- graptolites
 - erosion
 - vegetation
 - Sediment
 - ice
 - q-particles
 - fossil fuels
 - water

Now knowing that 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 bogs are composed of peat, choose the best answer.


 

   vegetation      