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.
They represent the different levels of sin. Hope this helps! ^^
I think it's the last one. I hope you find the right answer.
