Which of the following accurately defines biomass?

Biomass is accurately defined as anything that is or was recently alive. This includes a wide variety of organic materials such as plants, animals, and organic waste. Biomass serves as a renewable source of energy and can be used for heating, electricity generation, and as a feedstock for biofuels. Understanding biomass in this context is crucial for discussions around sustainable energy practices, carbon cycling, and environmental impact.

The definition aligns with the primary focus of biomass in energy production, where materials derived from living organisms capture energy from the sun through photosynthesis. This energy can then be harnessed and converted into useful forms. The broader implications of biomass relate to carbon neutrality and the potential for reducing reliance on fossil fuels.

Other options do not relate to the true nature of biomass. Inorganic substances, synthetic materials, and limitations to just solid organic waste fail to encompass the wide range of organic material that qualifies as biomass, which can include gases and liquids derived from biological processes as well.