why is the setting important to this novella and how does it influence the protagonist and at least 3 choices he makes in the story ?

The main action takes place in the family's apartment. Gregor first gets up in the morning, assuming he will go to work. He cannot move appropriately so he is unable to go to work to support his family. He tries to communicate with his family, but his voice goes scratchy and gets more and more un-understandable. He also tries to come out of the room, but he cannot; his father at one point throws an apple at him. The apple lodges in Gregor's back.