Answer: paintings -plural noun , section -singular noun ,museum -singular noun
Step-by-step explanation:
Noun refers to the name of a person, place animal or thing and singular refers to one and plural refers to many
As we know 'paintings' is a thing and 's' denotes many things
so paintings => plural noun
As we know 'section' is a thing and denotes only one
so section=> singular noun
'museum' is a place and denotes only one
so museum=>singular noun