She explains to him that he has an upper hand in the situation (knowing that Jack was saying bad things about him). She then tells him that if he refuses to go back to school on his own, she'll tell their parents who will tell the school principle and that everyone will start treating him like a freak that needs to go to a special needs school. That is ultimately what makes up his mind to go back.
Everyone is different and everyone has a distinct personality. Even though you may have the same personality type as someone else, your experiences, characteristics, environment, etc. all have a role in determining your true personality. Hope this helped!
If I’m understanding the question it uses both metaphors and alliteration in the poem which is uncommon because most poetry uses typical one literary device and not multiples at the same time
