The person narrating has committed a murder and shoved the corpse under his floorboards. As some time passes the heart beat is a glimpse into his insanity, and how he is delusional over hearing non existent sounds. He believes he hears the heart of the person he murdered under the floorboards, which is a delusion, most likely made out of paranoia. When the police come to ask about the victim, the man almost fools them until he breaks down and confesses. He expressed annoyance at the victim earlier, saying that he could not get away from their eye, I believe. He tried to solve this by killing them, but his mind would not let him do so by making up false realities.
PROS: Our country beleives in everyones freedom and so if we helped them it would be <em>constitutional.</em>
CONS: Some of our resources come from Russia and we would not have access to that if we interfeared. This would probably cause a world war.
The why the story is told by the reader imagination
I think its b. culture lets the reader know which of the characters’ behaviors are normal and which are unusual