You didn’t put the story so I can’t answer the question
Answer:
Either, but if you need to pick one it would be noun.
Explanation:
The predicate nominative (or predicate noun) is the noun or pronoun that comes after a linking verb. It renames the subject of the sentence. The sentence should still make sense if you switch the predicate nominative and the subject.
Melancholy would mean sadness, so the answer is B
The answer is B hope that helped