Question

which type of star will become a black hole when it dies? a protostar a supergiant. a white dwarf a red dwarf

Explanation:

Supergiants are massive stars. When they run out of nuclear fuel, their cores can collapse under their own gravity to form black - holes. Protostars are in the early stage of star formation. White dwarfs are the remnants of low - to medium - mass stars and red dwarfs are small, long - lasting stars that do not have enough mass to become black holes.

Answer:

B. a supergiant