At hagia sophia the entire roof structure rests on four massive:

Answer;

Piers

At hagia sophia the entire roof structure rests on four massive piers.

Explanation;

The Hagia Sophia is a domed monument built as a cathedral and is now a museum in Istanbul, Turkey. it is a domed monument originally built as a cathedral in Constantinople in the sixth century A.D. Whose entire roof structure rests on four massive piers.

answer; ///i do believe that the correct answer is (b); ///to inform, entertain or persuade an

hydroxyl -oh

alcohols, always polar, can form hydrogen bonds with h2o molecules

carboxyl -cooh  

cargoxylic acids, has acidic properties which is a source of hydrogen ions, found in cells in ionized for with a charge of oh-1

carbonyl > co

ketone if within skeleton, aldehyde if group is at the end of skeleton, k & a may be structural isomers, it determines 2 sugars (ketose & aldose)

amino -nh2

amines, acts as a base, it can pick up h+ ions from surrounding solution, ionized with charge of 1+

methyl ch2

addition to rna/dna affects and gene expression

phosphate -opo3 ²⁻

organic phosphates, contributes to negative charge to, molecule that it is a part of, and potential to react with h20

sulfhydryl -sh

thiols, cross-linking stabilize the protein, and it is structure