The rising action develops conflict. The guy is mad about the old guy's eye. As it goes on, it shows how important this is. If the guy didn't not care for the eye, there would be no story.
The climax is the turning point or the point of the story that changes everything. The guy goes into the room on the eighth night and sees the old man's eye open. It makes him mad and he goes over to kill him. This is showing that the guy is going to do that.
Falling action is after the climax and it starts tying up all the loose ends of the story. After the guy kills the old man, the police come over. He invites them in and they sit in the old man's room where he in buried. They end up sitting and talking for some time.