Most archaeal cell walls consist of ; most bacterial cell walls consist of a polymer of peptides and polysaccharides.

The answer to this question is Proteins
Archaeal cell walls are functioned to protect themselves from the envrionment. This walls are created by proteinaceous surface (S‐) layer that consist of protein that make them had the ability to form some sort of crystal-like substances that make their walls stronger.

Well i had the same answer, so the correct answer would be a. but in this case it would be the one with plasma membrane and cell wall circled that is next to the hairy pill type of thing.