The main idea is number 9, i think
to visualize the play's setting
The first paragraph of stage directions describe the play's setting. It full describes the layout of the room, including the placement of doors and windows. The furniture is explained and laid out. Also described are the wall decorations. It gives a clear picture of the setting. The other options are incorrect because we aren't introduced to any of the characters or a possible theme of the play.
I believe the answer is a stage whisper. A stage whisper is defined as “a loud whisper uttered by an actor on stage, intended to be heard by the audience but supposedly unheard by other characters in the play.”
False. An eyewitness account, is a primary source. A tertiary source is an index or textual consolidation of primary and secondary sources. :)