The correct answer is the balance of stars is essentially brought about by two forces. These forces are the star's inner gravitational pull and the thermal energy produced by fusion processes' outward pressure push. These two forces prevent a star's collapse and constantly maintain a star in equilibrium.
A star's equilibrium with respect to gravity is governed by two forces. These two forces are distinguished as the star's gravity and its outward pressure push, respectively. It is a self-regulating and stable process that keeps the stars in this equilibrium. Hydrostatic equilibrium is the term used to describe this state of the stars. The fusion events occurring in a star's core produce an outward pressure force. From the high-pressure core to the low-pressure surface, which is balanced by inward gravity, is the direction of pressure force in stars. A star will experience a rise in internal gravity if we add more matter to it, which is again counterbalanced by internal pressure to maintain the star stable.
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