How does a high-mass star differ from a low-mass star as both enter the final stages of their life cycle? a. a high-mass star dies more explosively. b. a high-mass star ends in a nova event. c. a high-mass star ends when it runs out of hydrogen. d. a high-mass star converts helium to carbon, whereas a low-mass star does not.,

B. A high-mass star ends in a nova event. When a high mass star gets to the end of its life, the gravity of its mass collapses upon itself, causing the collapse to accelerate and cause a nova event. On the other hand, smaller mass stars typically either become white dwarfs or red giants, depending on the particular circumstances and mass of the star.

X> -2 is the simplified version.