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

Fossil fuels are classified as non-renewable resources because they are formed over millions of years from the remains of ancient plants and animals. Once extracted and used, they cannot be replenished within a human timescale, leading to depletion as reserves are consumed. This contrasts with renewable resources, which can be naturally replenished or regenerated in a relatively short time frame. Wind energy, solar power, and hydropower are all examples of renewable resources because they rely on natural processes that are continually available and can be harnessed without fear of running out.