I don't see the question lol.
Explanation:
It allows him to hear the war drum that forces him to kill. The acute silence makes the narrator so uncomfortable, he must make the old man scream. The narrator thinks that only killing the old man will make all of the surrounding noises disappear
Aww why thank you kind human or whatever you are, you could be a unicorn for all i know. Welp have a noice day and toodles.
4 is the correct answer on apex