Question

why do galaxies remain together instead of dispersing into space? a they are connected by solar winds from their stars. b they are held together by magnetic fields. c they are glued together by dark energy. d they are bound by gravity acting between stars and other matter.

Explanation:

Gravity is the fundamental force that holds stars, planets, and other matter within a galaxy together. Solar winds are streams of charged particles that don't bind galaxies. Magnetic fields are not the primary binding - force for galaxies. Dark energy is thought to be responsible for the expansion of the universe, not for binding galaxies.

Answer:

D. They are bound by gravity acting between stars and other matter.