I think this is definitely WHO because the story is talking about a certain unknown character.
The word choice is action words such as fall, run ect.
Answer:
I thought about my decision a hundred times before writing this letter.
Explanation:
The final lecture in which Julian gave to her mother ironically applies more to him than his mother. It is because his mother's death was the least expected thing to happen yet it happen therefore Julian needs to accept it and face the new world without his mother.
