What type of energy source is derived from renewable plant and animal materials?

Biofuel is derived from renewable plant and animal materials, making it a sustainable energy source. Plant materials, such as crops and agricultural residues, can be processed to produce ethanol or biodiesel, while animal materials can contribute fats and oils for similar purposes. This energy source offers the benefit of being replenished relatively quickly, as opposed to fossil fuels, which take millions of years to form.

Utilizing biofuels can also reduce greenhouse gas emissions when compared to traditional fossil fuels, as the carbon dioxide released during combustion is offset by the carbon dioxide absorbed during the growth of the biomass. This creates a more circular carbon lifecycle. In contrast, fossil fuels, nuclear power, and geothermal energy do not focus on energy derived primarily from organic renewable materials, distinguishing biofuel as the correct answer.