adjective
And is a conjunction.
The word "revolution" is a noun, as it's a thing.EX: There was a revolution two years ago.
"Ago" is an adverb that indicates a period of time elapsed from the present. It is typically used to express how much time has passed since a specific event or point in time.
The part of speech for this particular word is a noun.
part of speech
The part of speech for "answer" is a noun.
what part of speech is beneath
adverb
The part of speech for "explicit" is an adjective.
The part of speech for "lecturer" is a noun.
The part of speech for "rapid" is an adjective.
The part of speech of "came" is a verb.