The correct answer of the given question above would be the third option. What the main idea does not do is to show what a reader will learn, rather, it only shows what the story is about, summarizes the details and events, and illustrates an important idea. Hope this answers your question.
which lines have one complete thought that best sums up the meaning of the poem
Not all answers are accurate or accountable
Personification is a figure of speech in which a thing /an idea is given human attributes.
Here instead of "you will pay the price", the author says "your lives will pay the price", using personification.