Which of the following is true about renewable energy sources?

Renewable energy sources are characterized by their ability to be replenished naturally over time. This includes sources like solar, wind, hydro, geothermal, and biomass energy, which can be naturally regenerated and are not depleted when used. For instance, sunlight and wind are abundant and can be harnessed repeatedly without the risk of exhausting the source.

In contrast to fossil fuels, which are finite and take millions of years to form, renewable sources maintain a sustainable cycle, making them more environmentally friendly as they help reduce carbon emissions and dependence on depleting resources. The notion that renewable energy is always more expensive than non-renewable sources does not hold true universally, as market conditions and technological advancements can significantly influence costs. Additionally, while some renewable sources may have variable outputs based on weather conditions—such as solar and wind energy—the key characteristic is their ability to regenerate.

Therefore, the assertion that renewable energy can be replenished naturally over time accurately reflects one of the most critical aspects of renewable energy, emphasizing its sustainability and efficiency as a long-term energy solution.