Question

question 11
1 pts
what observational evidence supports the fact that our universe is expanding?
detection of cosmic strings
redshifts of galaxies
discovery of quasars
discovery of black holes
evolution of galaxies with distance

Explanation:

The redshift of galaxies (Hubble's observation) shows that most galaxies are moving away from us, with farther galaxies receding faster—key evidence for cosmic expansion. Other options (cosmic strings, quasars, black holes, galaxy evolution) do not directly support expansion.

Answer:

Redshifts of Galaxies