Which of the following is not a renewable energy resource?

The correct choice identifies coal as not being a renewable energy resource. Renewable energy resources are those that can be replenished naturally over relatable timeframes, meaning they won’t run out in the human timescale. Wind, geothermal, and hydroelectric power are considered renewable because they harness natural processes that continually occur. Wind energy is produced using wind turbines that convert wind into electricity, and wind will always be available as long as the sun heats the Earth. Geothermal energy derives from the Earth's internal heat, which is essentially constant, and its usage does not exhaust the Earth's heat resources. Hydroelectric power generates energy by using flowing water, typically from rivers or dams, which is also replenished through the natural water cycle.

In contrast, coal is a fossil fuel formed from decomposed organic material over millions of years. It is a finite resource that, once consumed, cannot be replaced within a human timeframe. Therefore, it is classified as a non-renewable energy source, making it the correct choice for this question. Understanding these classifications is essential for evaluating different energy sources and their sustainability.