Which of the following is not a biomass energy source?

Nuclear energy comes from atomic fission, not from living or once-living matter, so it is not a biomass source.

Wood is classic biomass, burnt directly for heat.

Gobar gas from cattle dung is a biomass-derived fuel.

Biogas produced from organic waste is also biomass energy.

Biomass stores solar energy captured by plants, unlike nuclear fuel.

Uranium's energy originates in the binding forces of the nucleus.