How does the inward force of gravity overcome the outward force of radiation pressure during the end of a star?

A) As the star gets bigger, the force of gravity also gets bigger, while the radiation pressure stays the same.



B) The star fuses more hydrogen as it gets near the end of its life, then the fusion of hydrogen is converted to gravity.



C) Near the end of its life, a star runs out of hydrogen to fuse, and fusion is what creates the radiation pressure.



D) Gravity increases with time, so the older a star gets, the more it is affected by the force of gravity.How does the inward force of gravity overcome the outward force of radiation pressure during the end of a star?C ...



At the end of the Giant/Super Giant phase, it starts to run out of hydrogen all together. When it runs out of Hydrogen, or is nearly out, it begins converting Helium to Carbon and Carbon to heavier elements until it gets to a too stable element for its amount of heat and pressure to convert, then when the radiation output starts waning, the Gravity of the star will begin to overcome the outward pressure of the radiation.



(supposedly in very very hot stars(blue), they can have the ability to get to Iron, in which case is very stable and is near the end of the star's life)How does the inward force of gravity overcome the outward force of radiation pressure during the end of a star?C