Fact 1: Being burried under soil and mud changes vegetation into peat through extreme heat and pressure in a swamp over a long period of time.

Fact 2: Often, the soil consists of mats of very acidic, semi-decayed vegetation, such as peat.

Given the two facts above, answer the question "Decayed vegetation turns to what over a period of time?" with the following options: 
- growth
 - death
 - peat
 - vines
 - water
 - coal
 - flora
 - potash


 

   peat      