What is the source of the Sun's energy?Multiple choice question.fusion reactionsfission reactionsradioactive decayhydrogen combustion

Analysis of the Options

1. Fusion Reactions: This is the process where two light atomic nuclei combine to form a heavier nucleus, releasing energy. In the case of the Sun, hydrogen nuclei fuse to form helium, producing immense energy in the process.

2. Fission Reactions: This involves the splitting of heavy atomic nuclei into lighter nuclei, releasing energy. This process occurs in nuclear reactors but is not how the Sun generates its energy.

3. Radioactive Decay: This is the process by which an unstable atomic nucleus loses energy by emitting radiation. While this process can produce energy, it is not the primary mechanism for the Sun's energy generation.

4. Hydrogen Combustion: This refers to the chemical reaction of hydrogen with oxygen to produce water and release energy, but it does not occur in the Sun to provide energy.

Final Answer

The correct answer is fusion reactions. The Sun’s energy is generated through nuclear fusion, where hydrogen nuclei combine to form helium, releasing significant amounts of energy in the process.