Fossil fuels are an important natural resource used by society. Which of the following best describes fossil fuels?

Fossil fuels form over millions of years from the buried remains of ancient plants and animals. Coal, petroleum, and natural gas are examples, so choice b, “They are organic fuels derived from ancient plants and animals,” best describes them. They are not limited to liquid fuels, and the word “fossil” does not mean dinosaur fossils are commonly found in them.

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