A metaphor is a figure of speech that describes an object or action in a way that isn't literally true, but helps explain an idea or make a comparison. ... A metaphor states that one thing is another thing. It equates those two things not because they actually are the same, but for the sake of comparison or symbolism.
certain words they use can effect the tone
All of them except katrina helps her brother who is six years old with his homework is essential
The poetic device are sort or base on the following, The sound of word, The meaning of words, Arranging the words and The image of words . The poetic device that is used in the lines is Allusion in the Meaning of Words. Allusion is a brief reference to some person, historical event. work of art, or Biblical or Mythological situation or character