In which location does nuclear fusion naturally occur?

• A. In the Earth's crust
• B. In the oceans
• C. In Earth's atmosphere
• D. In the core of stars

Answer: (D)

Verified step by step guidance

1. Understand the concept of nuclear fusion: it is a process where two light atomic nuclei combine to form a heavier nucleus, releasing a large amount of energy.
2. Recall that nuclear fusion requires extremely high temperatures and pressures to overcome the repulsive forces between nuclei.
3. Consider the environments listed: Earth's crust, oceans, and atmosphere do not have the necessary conditions (high temperature and pressure) for fusion to occur naturally.
4. Recognize that the core of stars provides the extreme temperature and pressure conditions needed for nuclear fusion to take place naturally.
5. Conclude that nuclear fusion naturally occurs in the core of stars, where hydrogen nuclei fuse to form helium, powering the star.