Final answer:
Biomass energy is made from plants that have decomposed and been compressed over millions of years. This organic matter undergoes anaerobic decay and is transformed into fossil fuels like coal, oil, and natural gas.
Step-by-step explanation:
The correct answer is A. Biomass. Biomass energy is made from plants that have decomposed and been compressed over millions of years. This organic matter, such as dead plants and animals, undergoes anaerobic decay and is transformed into fossil fuels like coal, oil, and natural gas. Biomass energy is a renewable energy source that can be used to generate heat, electricity, and fuel.