Why do Harry, Malfoy, and Ron have an argument?

Harry Potter chapter 6

What's my name? if you know you know

Form two real words by combining a prefix and/or suffix with the root listed below. if you need to, use your dictionary. then illustrate that the word has the meaning of that root by using one of those words in a sentence. example: dic, dict=to say 1. addiction 2. edict the judge's edict was the final say in that matter. mit, mis=send

How did rick respond to this conflict