The delivery of a speech helps the audience understand the topic, what you're talking about, and keeps the speech on track.
For example, if you were giving a speech on Romeo and Juliet, you wouldn't want to get off topic by giving information about Shakespeare's life instead of information and analysis of the play.
Answer:
a: this homesick sailor is struggling to save his crewmen and himself
I believe you meant to say is instead on us and that would mean a spelling pattern is a repeated form