Answer:
Pun.
Step-by-step explanation:
--> aside = a remark or passage in a play that is intended to be heard by the audience but unheard by the other characters in the play.
--> pun = a joke exploiting the different possible meanings of a word or the fact that there are words which sound alike but have different meanings.
--> tragedy = a play dealing with tragic events and having an unhappy ending, especially one concerning the downfall of the main character.
--> soliloquy = an act of speaking one's thoughts aloud when by oneself or regardless of any hearers, especially by a character in a play.