The best answer is A. Her willingness to battle her homesickness shows the importance of not giving up on new experiences.
This answer reflects the theme of the story, which is about overcoming challenges and finding happiness in a new place. Sarah does not give up on her new family, even though she misses her old life. She learns to appreciate the beauty and joy of living on the prairie with Papa, Anna, and Caleb.
The other options are either incorrect or not supported by the story.
B. Her need to talk only about home develops the theme that the past is more important than the present. This is incorrect because Sarah does not talk only about home. She also listens to Anna and Caleb’s stories and shares her own interests and talents with them.
C. Her ability to forget her past develops the theme that anything is possible if one is truly determined. This is incorrect because Sarah does not forget her past. She still remembers and loves her brother and her home in Maine. She also writes letters to them and keeps some of her belongings from there.
D. Her decision to hide her sadness from others shows the dangers of keeping painful feelings to oneself. This is not supported by the story because Sarah does not hide her sadness from others. She tells Papa that she misses the sea and that she is lonely sometimes. She also cries when she receives a letter from her brother.