Which sentence about galaxies provides evidence of universe expansion that supports the big bang theory

Question

Galaxies are moving away from each other

Galaxies are in constant motion

Galaxies are movint more slowly than they have in the past

Galaxies are moving at different speeds and in different directions

Answer 1

The sentence that provides evidence of universe expansion that supports the Big Bang theory is:

Galaxies are moving away from each other.

This observation, first noted by Edwin Hubble, indicates that the universe is expanding, which is a key element of the Big Bang theory.