The energy radiated by the Sun is because of:
- ANuclear fusion
- BNuclear fission
- CRadioactive decay
- DPhoto-electric effect
Solution & Step-by-step Explanation
The colossal energy output generated by the Sun is caused by nuclear fusion reactions deep within its core. Under extreme gravitational pressure and high temperature, lighter hydrogen nuclei fuse together to form heavier helium nuclei, releasing massive amounts of energy according to mass-energy equivalence.