Which one is not an organic source of energy?

The correct answer is (c), uranium. Uranium is a non-renewable mineral that is formed by the decay of radioactive elements. Coal, wood, and natural gas are all organic sources of energy, meaning that they were formed from the remains of living organisms.

Coal is a fossil fuel that is formed from the remains of plants that lived millions of years ago. Wood is a renewable resource that is made from the trunks, branches, and leaves of trees. Natural gas is a fossil fuel that is formed from the remains of ancient plants and animals.

Uranium is a non-renewable mineral that is formed by the decay of radioactive elements. It is used to generate electricity in nuclear power plants.