Final answer:
In playwriting, an aside is when a character makes a brief remark either to the audience or another character, typically revealing their true thoughts. Option 3.
Step-by-step explanation:
Within the context of a play, when a character directly addresses the audience or another character to offer a comment on the action, this is known as an aside.
An aside differs from a monologue, soliloquy, and dialogue in that it's a brief remark, often intended to convey the character's true thoughts or feelings to the audience without the other characters hearing.
Unlike dialogue, which involves multiple characters conversing, a monologue is a longer speech by one character, often to other characters, while a soliloquy is a speech where a character speaks his or her thoughts aloud when alone, or thinks to be alone, on stage.
So Option 3