Which of the following is NOT considered a renewable resource?

Coal is classified as a non-renewable resource because it is formed from ancient organic materials that have undergone geological processes over millions of years. Once extracted and used, coal takes an extremely long time to replenish, making it finite in supply. In contrast, wind energy, solar energy, and biomass are viewed as renewable resources. Wind energy is harnessed from natural air currents, which are continually available. Solar energy derives from sunlight, an inexhaustible source on a human timescale. Biomass, which comes from organic materials, can be replenished relatively quickly through sustainable agricultural practices. Therefore, coal stands out as the only non-renewable resource in the list provided.