Which of the following is an example of a non-renewable resource?

Natural gas is an example of a non-renewable resource because it is a fossil fuel that forms from the remains of ancient organic matter subjected to heat and pressure over millions of years. Once extracted and used, it cannot be replenished within a human time scale, meaning that the supply is limited and will eventually run out. In contrast, the other options represent renewable resources, which can be naturally replenished over time. Solar energy, wind energy, and hydropower are all derived from natural phenomena that are continually available, thus making them sustainable alternatives to non-renewable sources like natural gas.