Question

if the gravitational pull on a neutron star is too strong it will become unstable. if it is unstable, it collapses in on itself forming a ______
blackhole
giant
nebula
neutron star
protostar
star
super giant
supernova
white dwarf

Explanation:

When a neutron star's gravitational pull is too strong and it becomes unstable, it collapses further to form a black hole. Other options like nebula, giant, neutron star (it's the starting point here), protostar, star, super giant, supernova, white dwarf don't fit as the end - stage collapse of an unstable neutron star.

Answer:

A. blackhole