Which variety of coal contains recognisable traces of the original plant material ?

Which variety of coal contains recognisable traces of the original plant material ? Correct Answer Peat

Peat contains recognizable traces of the original plant material. Initially the peat is converted into lignite or ‘brown coal’ - these are coal-types with low organic maturity. In comparison to other coals, lignite is quite soft and its colour can range from dark black to various shades of brown.
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