The variety of coal in which the deposit contains recognizable traces of the original plant material is____________?
Correct answer: D. peat
- A. bitumen
- B. anthracite
- C. lignite
- D. peat
Explanation
Peat is the earliest coal-forming material and still contains recognizable partly decomposed plant remains. Lignite, bituminous coal and anthracite are progressively more altered and carbon-rich forms.
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