Which of the following is a renewable energy source?

Solar energy is considered a renewable energy source because it is generated from the sun's rays, which are abundant and will not run out on a human timescale. Unlike fossil fuels such as natural gas and coal, which are finite resources formed over millions of years and contribute to environmental degradation through their extraction and use, solar energy harnesses a natural and sustainable source that can be tapped into repeatedly. Solar panels convert sunlight into electricity, and advancements in technology allow for more efficient and longer-lasting systems. Additionally, solar energy produces little to no greenhouse gas emissions during operation, making it an environmentally friendly alternative that can play a significant role in combating climate change.

In contrast, other options, such as natural gas and coal, are fossil fuels that take millions of years to form and contribute significantly to pollution and greenhouse gas emissions. Nuclear waste, on the other hand, is a byproduct of nuclear energy generation and is not a source of energy itself, nor is it renewable. Therefore, solar energy stands out as a clean, sustainable, and renewable option.