It provides background by telling how the narrator got his job as a rescuer.
Explanation:
This is the statement that best describes how the exposition affects the story. In this story, we learn about the character and how he became a rescuer. This background story is presented in the exposition. The exposition is the section of the story in which the author introduces information about events, setting, characters and other background information that the reader needs to know in order to better understand the story.
