Question

question 2
gravitational (or hydrostatic) equilibrium is:
the ability of a star to balance itself at a point in space.
the balance between gravity & pressure which keeps a star stable.
the balance between fusion & fission in a stars core.
the reason why coronal mass ejections are so severe.

Explanation:

Gravitational (or hydrostatic) equilibrium in a star occurs when the inward - pulling force of gravity is balanced by the outward - pushing pressure from the hot gases inside the star, keeping it stable. Fusion occurs in a star's core, not fission, and it's not related to the definition of gravitational equilibrium. Coronal mass ejections are also not related to the concept of gravitational equilibrium.

Answer:

the balance between gravity & pressure which keeps a star stable.