How can the sun give out?

The sun generates energy through a process called nuclear fusion, where hydrogen nuclei combine to form helium, releasing vast amounts of energy in the form of light and heat. This energy travels through space and reaches Earth, providing the necessary warmth and light to support life. Over billions of years, the sun will gradually exhaust its hydrogen fuel, eventually leading to its transformation into a red giant and then a white dwarf. However, this process will take billions of years, so the sun is not in immediate danger of "giving out."