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 would say that these lines suggest a sense of space with resonating power. You can see that they speak of freedom and liberty, and the vastness of space in the forest and the desert.
It can be proven using objective evidence
