The sun's absorption spectrum is created by what exactly

Be as detailed as possible. Thank you.

Hmm. Mostly created by hydrogen since there is a lot of that at the emitting surface? Probably a lot of it in the Balmer series, because our star is not cold and not excessively hot but right about where shell n=2 is pretty commonly found in the emitting surface.

But your phrasing is odd, "what exactly?" And since there are a variety of absorption lines -- thousands of them, I would imagine -- it would be hard to be complete here. _Exactly_ what do you need this information for?