Part 1 of Essay
As you have learned, Greek drama evolved from the ritualistic performances of a chorus at the Dionysian festivals. After the actor Thespis stepped out of the chorus and began a dialogue with it, other characters soon followed, and the chorus's role gradually diminished in size (from fifty members to fifteen) and importance ....

Part 2 of Essay
.... the plot. These functions aided the movement of the story. First off, when the chorus was introduced into a play, one of its functions was to announce the entrances and exits of characters. This happened in many places of the story. The characters that the chorus took on were the first woman, second and third woman. All of them introduced new characters in order to move the play along smoothly. Such as in 1.29 when second woman and third woman introduce Creon when he arrives on the scene to talk to Med ....