Which one of the following is not a bio-mass energy source?

Biomass energy is derived from renewable organic materials such as wood, agricultural residues, and animal waste [4]. Wood is a primary source of biomass, often used as firewood or forest residue [6]. Gobar gas (biogas) is a gaseous form of biomass produced through the anaerobic digestion of animal dung and organic waste [4]. While coal is technically organic in origin, it is classified as a fossil fuel because it consists of fossilized remnants of organisms from millions of years ago and is considered an exhaustible, non-renewable resource [4]. In contrast, a nuclear reactor generates energy through nuclear fission using minerals like uranium, which is entirely distinct from biological or organic matter [5]. Therefore, a nuclear reactor is not a biomass energy source, as it relies on nuclear fuel cycles rather than recent organic carbon cycles [5].

Sources

1. [1] Environment, Shankar IAS Acedemy .(ed 10th) > Chapter 22: Renewable Energy > 22.6 BIOMASS > p. 292
2. [4] https://www.eia.gov/energyexplained/biomass/biomass-and-the-environment.php
3. [6] https://www.climatehubs.usda.gov/hubs/international/topic/biomass-energy
4. [3] Environment, Shankar IAS Acedemy .(ed 10th) > Chapter 22: Renewable Energy > Renewabte energy comprises of > p. 287
5. [5] https://afdc.energy.gov/fuels/properties