Final answer:
The chorus in classical theater, especially in Greek tragedies, was essential to the drama, moving and chanting in unison as part of the action. Choruses were integrated into the narrative to provide insights and to reflect upon the play's moral themes.
Step-by-step explanation:
Role of the Chorus in Classical Theater
The statement 'It was there so the members of the chorus moved as they chanted their lines' seems to refer to the use of a chorus in classical theater, particularly in Greek tragedies. In works by playwrights like Sophocles, the chorus was crucial to the narrative structure, moving and chanting as part of the dramatic action. However, it is not clear which particular work or context the student's question refers to.
The chorus interacted with the main characters, provided commentary on the action, and often reflected on the moral and societal themes of the play. Unlike later playwrights, such as Euripides, whose choral work oftentimes did not directly pertain to the play's subject, Sophocles integrated the chorus seamlessly into the overall dramatic work.
Throughout history, choruses and collective singing have been a means of expression, often combining various emotional tones in their performances. This is exemplified in different contexts, like the songs of slaves mentioned in the provided information or the historical use of a chorus in religious rituals. Overall, choruses have been an integral part of storytelling and expression in performance arts.