Being burried under soil and mud changes peat into coal through extreme heat and pressure in a swamp over a long period of time.
Well, a swamp is a type of wetland.
Being buried under soil and mud changes peat into coal in wetlands over time.
Being buried under soil and mud changes what into coal in wetlands over time?
Options:
1: peat
2: phytoplankton
3: fields
4: oil
5: air
6: pH
7: sunlight
8: elms