Which statement is true about the formation of fossil fuels?

Which statement is true about the formation of fossil fuels?

• A. They are formed from remains of ancient plants and animals subjected to heat and pressure over millions of years
• B. They are formed when plants photosynthesize in modern times
• C. They are created by harvesting energy from fossilized wood
• D. They are produced by rapid volcanic cooling of rock layers

Answer: (A)

Fossil fuels form from the remains of ancient plants and animals that get buried in sediment and subjected to heat and pressure over long timescales. Over millions of years, this organic matter is buried deeper, undergoing diagenesis and maturation. The heat from surrounding rocks drives chemical reactions that break down long-chain molecules into hydrocarbons, producing coal, oil, or natural gas. This transformation requires extensive time and the right burial conditions, not immediate biological processes or modern energy capture. The other ideas don’t fit because modern photosynthesis doesn’t concentrate energy into hydrocarbons that become fossils, fossil fuels aren’t created by harvesting energy from fossilized wood, and rapid volcanic cooling of rocks doesn’t produce the hydrocarbon compounds found in fossil fuels.

Fossil fuels form from the remains of ancient plants and animals that get buried in sediment and subjected to heat and pressure over long timescales. Over millions of years, this organic matter is buried deeper, undergoing diagenesis and maturation. The heat from surrounding rocks drives chemical reactions that break down long-chain molecules into hydrocarbons, producing coal, oil, or natural gas. This transformation requires extensive time and the right burial conditions, not immediate biological processes or modern energy capture.

The other ideas don’t fit because modern photosynthesis doesn’t concentrate energy into hydrocarbons that become fossils, fossil fuels aren’t created by harvesting energy from fossilized wood, and rapid volcanic cooling of rocks doesn’t produce the hydrocarbon compounds found in fossil fuels.