Answer:
Adjective
Explanation:
We can explain this by knowing basic principles of English.
An adjective In short, is known as a describing word.
Whereas a noun is a person place or thing so that is incorrect.
A verb is an action word meaning to hear or to do something so that is incorrect.
An adverb is an expression word that expresses verbs, adjectives, and or other adverbs. So that is incorrect.
So in short adjective is the correct answer.