Answer:
The answer is CENTER STAGE.
Step-by-step explanation:
Stage directions are given by the director and followed by actors on stage. The director resorts to them to move the characters during the play.
UPSTAGE: it refers to the back of the stage.
DOWNSTAGE: it refers to the front of the stage.
SIDE STAGE: it refers to the sides (left or right) of the stage.
CENTER STAGE: is placed at the middle of the stage. Hence, it is in between of stage-left and stage-right or in the middle of upstage and downstage.