Which factor is essential to the initial formation of galaxies, for either of the theories describing galaxy evolution?(1 point)

Question

Responses

Gravity acts on existing material, shaping it into a new form.
Gravity acts on existing material, shaping it into a new form.

The force of orbiting stars generates collisions.
The force of orbiting stars generates collisions.

Small lumps of material merge into larger clumps.
Small lumps of material merge into larger clumps.

Massive gas and dust clouds collapse.

Answer 1

The essential factor to the initial formation of galaxies, according to both theories describing galaxy evolution, is:

Massive gas and dust clouds collapse.

This collapse under gravity leads to the formation of stars and structures that will eventually coalesce into galaxies.