Answer: A.It serves as a flashback to Hana's life in Japan before she left for America.
Explanation:
Hana was 21 girl who wanted to escape from the village in Japan where she lived and that is why she is describing at the beginning of the passage. She escaped from Japan to America and she traveled by boat, that is where she felt the smelling of the fish. Her life in America was not as she planned, she was hoping for the better but she married a man who was working as a farmer so she had to work with him.