Biology

The correct answer is: D.Plants and animals that are buried underground for millions of years.

Here’s why:

Fossil fuels (such as coal, oil, and natural gas) are formed from the remains of ancient plants and animals that lived millions of years ago. Over long periods of time, the remains of these organisms were buried under layers of soil and sediment. The heat and pressure from this burial process, combined with the lack of oxygen, caused the organic matter to undergo chemical changes, eventually transforming it into fossil fuels.

1.Coal is primarily formed from the remains of plants (especially from ancient forests) that were buried and subjected to heat and pressure.

2.Oil and natural gas are primarily formed from the remains of marine microorganisms (like plankton and algae) that were buried under the ocean floor and subjected to similar conditions over million...