Biomass fuels store energy from sunlight in which form?

• A. Thermal energy
• B. Mechanical energy
• C. Chemical bonds of organic molecules
• D. Electrical energy

Answer: (C)

Verified step by step guidance

1. Understand the concept of biomass fuels: Biomass fuels are derived from organic materials such as plants and animal waste. These materials store energy originally captured from sunlight during photosynthesis.
2. Recall the process of photosynthesis: During photosynthesis, plants convert sunlight into chemical energy stored in the form of glucose and other organic molecules. This energy is stored in the chemical bonds of these molecules.
3. Identify the type of energy stored: The energy in biomass fuels is stored as chemical energy within the bonds of organic molecules, such as carbohydrates, lipids, and proteins.
4. Eliminate incorrect options: Thermal energy refers to heat, mechanical energy involves motion, and electrical energy pertains to the flow of electrons. None of these are directly related to the energy storage in biomass fuels.
5. Conclude the correct answer: The energy stored in biomass fuels is in the form of chemical bonds of organic molecules, which can be released during combustion or other processes to produce usable energy.