What best defines a renewable resource?

• A. A resource that can be replenished naturally over time
• B. A resource that never runs out
• C. A resource created by humans
• D. A resource that cannot be replaced

Answer: (A)

A renewable resource is something that can be replenished naturally over time, so its supply can recover as it is used. This means energy sources like sunlight, wind, and flowing water are continually renewed by natural processes, provided we use them at a sustainable rate. The important idea is that renewal happens through natural cycles, not that the resource is infinite or forever untouchable. It also isn’t limited to human-made items; many natural resources are renewable when managed wisely. In contrast, non-renewable resources cannot be replaced within a human timescale, so they can run out.