What is the primary mechanism that prevents a neutron star from collapsing further into a black hole?

Answer

Repulsive forces between the constituent neutrons

The matter in a neutron star is so tightly packed that the repulsive forces arising between the neutrons, known as neutron degeneracy pressure, counteract the immense gravitational pull.

What is the primary mechanism that prevents a neutron star from collapsing further into a black hole?
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