What grade are you doing this for lol
The ground shook in response to the deafening crash, and the world seemed to stand still for a moment. But only just. The ground shook, the people around the area breaking into a commotion. All of them swarmed to the nearest shelter, desperately searching for a means to escape their fate. One person rushed into their home, hastily barricading the door as several people followed after them. Another stood on the edge of a roof, apprehensively taking a step forward as the world went up in flames around them. It had come. The apocalypse, long awaited, was finally happening.
B. To entertain readers with an interesting anecdote from the author’s childhood
Answer:
To show that Creon was not right about his judgment of Antigone, Haimon told the story of a captain who was wrong even when he was doing the right thing.
Explanation:
Haimon did not agree with Creon's judgment on Antigone, although Creon was sure he was correct. For this reason Haimon cited a story as a wise and delicate argument to get Creon to reflect on his actions and thoughts about Antigone.
Haimon quoted the story about a captain who left the sails and stretched, because he knew this was the right thing to do and was sure he was doing good to his ship and his crew. However, the ship was tipped over by the wind and the sea, showing that the captain's certainty about the sails was incorrect in preventing the ship from tipping over. With that, Haimon is telling Creon that everyone can make mistakes inside things he believes are correct, so he should reassess the judgment that Antigone was receiving.
I think the single sentence that shows it is a personal letter is "that all I can say is that I am well" as the rest of the letter is details about his military campaign so could be part of a more formal memo if it were not for this opening sentence so that seems to be how to identify it as such.