How does the brightness/luminosity change throughout the cycle of a massive star?

As the size of a star increases, luminosity increases. If you think about it, a larger star has more surface area. That increased surface area allows more light and energy to be given off. Temperature also affects a star's luminosity.

Explanation:

i think that the best answer would be c.

tell me if im wrong : )

they fuse to form they have half as many chromosomes as a somatic cell of the same individual. b