Which term can also be referred to as 'the spine' of a play?

The term that refers to 'the spine' of a play is known as the super-objective. In theatrical terms, the super-objective is the central goal or motivation of the protagonist throughout the play. It drives the character's actions and decisions, serving as the underlying framework around which the entire narrative is constructed. This overarching aim influences not just individual scenes but also the emotional and thematic development of the entire performance.

Understanding the super-objective is crucial for actors, as it helps them craft a cohesive portrayal of their character. It enables them to connect with the narrative's core and ensures their performance aligns with the overall message of the play. This concept is integral to both the writing and performance aspects of theatre, as it helps maintain a clear focus on the character's journey and conflict.

The other options do not capture this essential concept. Sub-objective refers to secondary goals of a character within specific scenes rather than their overarching aim. The term "active segment" does not pertain to a recognized concept in playwriting or performance analysis, nor does "modeling," which typically relates to the process of creating a representation rather than a thematic structure in storytelling.