What force pushes outward from a star's core to precisely match the inward squeeze of its own gravity, keeping the star stable?

The force pushing outward from a star's core that precisely matches the inward squeeze of its own gravity is hydrostatic pressure. This pressure is generated by the extreme thermal energy produced by nuclear fusion reactions occurring deep within the star's core. Hydrostatic pressure is the outward force exerted by the hot gas and plasma within the star. Imagine countless particles, like atoms and electrons, moving at incredibly high sp....