Pls help me its in the photo

The best persuasive essay topics a.are the ones that are popular,that many other people are writing about b.are ones you feel strongly about and that can be backed up by outside sources c.are one you feel strongly about,whether or not there is outside evidence for support

Read this sentence from "the wife's lament

Who is ¨ the guilty party¨ at the end of the text, and how do his actions contribute to the storys theme?