Question

what is a monologue?
the author’s most important ideas in a poem, a short story, or a play
a long address given by a character in a story, movie, or play
a speech in a movie or play that a character gives to themselves when alone on screen or stage
the main character’s words that are intended only for the audience

Explanation:

A monologue is a long speech delivered by a single character in a fictional work like a story, movie, or play. It can be directed at other characters, the audience, or spoken when the character is alone (a soliloquy is a specific type of monologue, but the broader definition covers all long single-character addresses). The other options are incorrect: the first describes a work's central theme, the third only defines a soliloquy (a subset), and the fourth describes an aside.

Answer:

a long address given by a character in a story, movie, or play