In hyperbole there is an exaggeration and sometimes it is kind of unrealistic (ex. He is tall as the sky). Metaphor is a comparison of things but not in a literally sense (ex. Love is fire). Alliteration appears in the repetition of some letter in a phrase or verse like in this example from Shakespeare “Beauty's effect with beauty were bereft”. Simile is a comparison of two things using “as” or “like” such as: he is young like my sister or the example here they are comparing the kids with the parents using the world "like".
