Alpha Centauri C is: a supergiant
the largest star in our solar system
the closest star other than the sun
the closest spiral galaxy

C. closest star other than the sun

Explanation:

searched it up

I think the answer is  Alpha Centauri C is the closest star other than the star.

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.

c. heat from the poles back down towards the equator.