Which statement about renewable resources is true?

• A. They are always available without limit
• B. They can only be used for a short time
• C. They can be used and replaced; non-renewable resources cannot be replaced
• D. They have no environmental impact

Answer: (C)

Renewable resources are those that can be replenished naturally over time, so we can use them again and again. The statement that fits this idea is that they can be used and replaced, while non-renewable resources cannot be replaced once they’re used up. This captures the key difference: renewables cycle back or are continuously available (sunlight, wind, water, biomass, etc.), supporting long-term use as long as demand doesn’t outpace replenishment. The other ideas aren’t accurate: renewables aren’t always available without limit because their availability depends on natural conditions (like sun and wind); they can be used for a long time but their supply still depends on replenishment and management; and while they generally have lower environmental impact than fossil fuels, they can still have environmental effects in production, deployment, and land use.