Hello, if the words underlined are "wolf-of-the-waves", then the correct answer is "kenning". It is very similar to a metaphor. Something figurative is used instead of a concrete noun. So, in this case, "the wolf-of-the-waves" actually refers to Grendel's mother.
Boy's should have to keep their eyes to themselves. I mean I get it if the girl wants it too. But come on. Also, It would be helpful too, I could wear both headphones while running.