A black hole is formed by a high-mass star collapses.
If a star has a mass larger than 25 solar masses, it collapses into a black hole.
Black holes are formed by stars that have mass larger than 25 solar masses.
Stars that have mass larger than 25 solar masses can form what?
Options:
a. moons
b. power stations
c. black holes
d. an object
e. suns
f. planets
g. scattered light
h. heat energy