What are the main types of fossil fuels?

• A. Solar, wind, hydro
• B. Coal, oil, natural gas
• C. Uranium, thorium
• D. Wood, peat, charcoal

Answer: (B)

Fossil fuels are non-renewable energy resources formed from ancient plants and animals that were buried and transformed by heat and pressure over millions of years. The main types are coal, oil, and natural gas, which represent solid, liquid, and gaseous forms of energy derived from the same natural process. Other options aren’t fossil fuels: solar, wind, and hydro come from sunlight and water cycles and are renewable; uranium and thorium are nuclear fuels used in reactors; wood, peat, and charcoal come from recently living vegetation and are considered biomass fuels, with peat being an early stage in coal formation and not typically classified as a fossil fuel.