Answer:
1) In my opinion, i dont think they heard a ghost. Even though I believe in the paranormal, it is most likely just something else. A figment of their imagination. I dont think so because houses shift and old house do espically.
2) It shows humor with the small things that happen amid the chaos. We can use textual evidence to prove this because the person retelling the story is naked, he then greets the police wearing a towel and then finds pants but no shirt. Really quickly, he finds one of his moms blouses which confuses the police even more. We also see the mom throwing a shoe into a window just because she wanted to which added to the chaos of what is happening. This teaches a lesson because it shows that you always need to find humor in miserable things. even if it hurts, we need to see humor in everything or else we will be miserable overall.
3) Fear drives the plot of the story because we dont know what is happening and the people in the story dont either. We aren't using the element of suspense like how Alfred Hitchcock and other suspense people would use the bomb under the table element but instead we are stuck with the knowledge of the main charachters in the story. I am using this example because this is what happens in most suspense movies and action movies too no matter how subtle. This helps drive the motivation of fear in everyday life because we dont know how many people know things about us that we also dont know.
I really hope my answers help!