Answer:
Decreasing concentration of hydrogen in nebula will prevent nuclear fusion.
Step-by-step explanation:
- Large clouds of dust and gases are called nebulae.
- The gas that comprises most part of nebula is hydrogen.
- Hydrogen and dust particles are pulled together due to gravity and the mass starts rotating.
- When hydrogen atoms collide with each other, they produce heat this process continues and the core of the cloud gets tremendously heated resulting in nuclear fusion.
- Nuclear fusion is the phenomenon in which two lighter nuclei fuse to form a heavier nuclei. In a nebula , two hydrogen nuclei fuse to form helium.
- Thus if the concentration of hydrogen is decreased in nebula then nuclear fusion will stop.