Answer: A) It reinforces the idea of the United Nations’ strength and power.
Repetition is often used as a rhetorical device in order to emphasize an idea. It can also be used to provide more weight to a particular topic or to leave a long-lasting image in the listener's mind. In this case, the idea that Roosevelt is trying to emphasize is that the United Nations will strike again, because of its strength and power. By repeating the word "strike," he is making sure that the listener understands the extent of this promise and the power of the UN.
The first line says "secure", which rhymes with the word "sure" (this is at the end of the second line). The word at the end of the third line is "keeps", which rhymes with the word of the forth line, "sleeps".
Hope this is what you're looking ford!:D
Answer:
A strategy she should use is to annotate and to make notes as she reads. If she doesn't know words or about the topic she can look it up or ask an adult/friend.