Answer:
B orchestra
Step-by-step explanation:
Orchestra comes from an ancient Greek term that literally meant dancing space or dancing floor. In ancient times, it was circular and stated between the seated area of the theatre (theatron) and the building behind the stage (skene). Orchestra was reserved for the chorus of the play – they would dance, sing and recite poetry in this place, sometimes interacting with the viewers. In the earliest times, it was made out of mud, with no structural distinction, but afterward, it was designed as a white marble curb in the shape of a full circle.
The first orchestra terrace was probably in the famous Theatre of Dionysus at the slopes of Acropolis. Excavations of the site show that orchestra here was also circular at first, but was later reshaped at the theatre space changed its purpose.