All answers are correct.
The lines "O, she doth teach the torches to burn bright / It seems she hangs upon the cheek of night" are indeed an example of:
- A heroic couplet: Two lines of verse that usually rhyme and are written in iambic pentameter.
- Romeo's dialogue: These lines are spoken by Romeo in Shakespeare's "Romeo and Juliet."
- Iambic pentameter: Each line consists of five pairs of syllables, with an unstressed syllable followed by a stressed syllable.
So, "All answers are correct" applies here.