Either D or A.. Not so sure though
Which compound has the greatest number of oxygen atoms per carbon atom is carbon, hydrogen, nitrogen, oxygen.
Answer:
Observations at different distances show galaxies of different ages and therefore different stages of evolution. Observations of those different galaxies helps us to learn abt galaxy evolution because observations of distant objects reveal them as they were in the past.
Explanation:
hope it helps
Its is an aerobic excerisice
