Simile:A figure of speech that compares two unlike things using the words "like" or "as". For example, "Her smile is as bright as the sun."
Symbolism:The use of symbols to represent ideas or qualities. For instance, a dove can symbolize peace.
Allegory: A story or poem in which characters and events represent abstract ideas or moral qualities. An example would be George Orwell's Animal Farm, where animals represent political figures and concepts.