One important aspect of writing an analysis of a text is remembering that examination needs to be profound. Therefore, it is not enough to restrict yourself to the examination of superficial aspects of the book. For example, it is not enough to explain what the characters' actions are. We also need to explain what the motives for these actions are, and whether they are consistent with other things that we have learned about the characters.
So, repetition is used in poems to show emphasis on a particular point. For your groupwork project you could possibly write a poem or a song and add repeated words to show you understand how to use repetition and when to use it.
