Question

galaxy evolution quick check
which factor is essential to the initial formation of galaxies, for either of the theories describing galaxy evolution? (1 point)
the force of orbiting stars generates collisions.
gravity acts on existing material, shaping it into a new form.
small lumps of material merge into larger clumps.
massive gas and dust clouds collapse.

Explanation:

In galaxy - formation theories, gravitational collapse of massive gas and dust clouds is fundamental.

Answer:

Massive gas and dust clouds collapse.