Why can't I part with this little boy? Can you tell me something about it?

This is a question and answer of the article "My Self-reproach" in the reading exercise of "Chinese Unit 2 Exercise in the Second Term of Grade Three".

The reference answer is as follows: I can't bear to part with this little boy because as a swallow, I was saved by this little boy when I was injured. I took good care of him until I got well. He released me back to nature and expressed the swallow's gratitude to the little boy.