How does gravity affect the life cycle of stars? How does it start and end the life of a massive star?
The more massive the star
The more massive a star is, it would have a large gravitational force.
Which as shown speeds up the nuclear fusion.
Example - Imagine you holing a water bottle upside down to let the water fall off. Your friend but presses the bottle (same kind) for the same purpose. Which one's bottle will empty first?
This would be a useful link.
How does it start and end the life of stars?