What eventually halts the gravitational collapse of an interstellar gas cloud that forms an object that is not massive enough to become a star?

The central object becoming hot enough to sustain nuclear fusion in its core

and/or crowding of electrons in the core

Explanation:

Irregularities in the density of the gas causes a net gravitational force that pulls the gas molecules closer together. Some astronomers think that a gravitational or magnetic disturbance causes the nebula to collapse. As the gases collect, they lose potential energy, which results in an increase in temperature.

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.