Being burried under soil and mud changes vegetation into peat through extreme heat and pressure in a swamp over a long period of time.
Often, the soil consists of mats of very acidic, semi-decayed vegetation, such as peat.
Decayed vegetation turns to peat in a swamp over periods of time.
Decayed vegetation turns to what over a period of time?
[1] growth
[2] death
[3] peat
[4] vines
[5] water
[6] coal
[7] flora
[8] potash