Final answer:
The Sun's energy comes from nuclear fusion.
Step-by-step explanation:
The Sun's Energy Comes From Nuclear Fusion
The Sun's energy is generated through a process called nuclear fusion. This reaction occurs at the core of the Sun, where hydrogen atoms combine to form helium.
This fusion process releases an enormous amount of energy in the form of light and heat, which is what sustains the Sun's brightness and provides warmth to our planet.
Learn more about Solar energy and nuclear fusion