What force must win the tug-of-war against internal pressure for a star to form?

Answer

Gravity winning that tug-of-war.

The transition from a diffuse, calm cloud to a star is dictated by gravity overcoming the internal pressure exerted by the slight thermal motion of the particles within the nebula.

What force must win the tug-of-war against internal pressure for a star to form?
physicsstabilitystarformationIGCSE