What is the main difference between renewable and non-renewable energy sources?

The main distinction between renewable and non-renewable energy sources lies in the ability of the sources to be replenished naturally over time. Renewable energy sources, such as solar, wind, hydroelectric, and biomass, can regenerate naturally and are sustainable as they rely on resources that are naturally replenished. For example, sunlight will continue to shine, and wind will continue to blow, allowing for a continuous supply of energy from these sources.

In contrast, non-renewable energy sources, which include fossil fuels like coal, oil, and natural gas, are finite; they take millions of years to form and cannot be replenished on a human timescale once they are depleted. The concept of renewability is critical for sustainability and addressing environmental concerns, as using renewable sources helps reduce reliance on limited resources that contribute to pollution and climate change. Thus, option C accurately captures the essence of renewable energy sources and their ability to regenerate naturally.