Correct option is C
The correct answer is
(c) Verb.
• The highlighted word “celebrate” shows an action (to observe/mark something with joy).
• Action words are called verbs.
• In this sentence, “celebrate” tells what action is being suggested to “you”.
Example: People celebrate festivals with joy.
Why other options are incorrect:
• Adverb modifies a verb/adjective/adverb, but “celebrate” itself is an action word.
• Pronoun replaces a noun (he, she, it, you), but “celebrate” is not replacing anything.
• Adjective describes a noun, but “celebrate” does not describe a noun here.