All of the options listed can be considered dramatic elements to some extent, but the best answer in the context of traditional dramatic elements is typically tension.
- Audience refers to the spectators of the performance.
- Theme is a central idea or message.
- Monologue is a speech delivered by a single character.
However, in terms of dramatic structure, tension is specifically related to the conflict and emotional engagement within the play or performance, making it a core element of drama.