Final answer:
Coal is a solid fossil fuel derived from ancient plant material, formed under specific conditions and used as a fuel source.
Explanation:
Coal is a fossil fuel formed from plant remains that underwent high temperatures and pressures over millions of years, resulting in a solid material. It is primarily derived from the large swamp forests of the Carboniferous Period and is used as a fuel source. Coal is classified into different types based on carbon content and heat energy production capabilities, such as anthracite and lignite.
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