Parallelism is a literary and rhetorical device that involves using similar structures in sentences or phrases to create rhythm and clarity. This technique helps emphasize ideas and makes them easier to remember. For example, in the phrase "I enjoy reading, writing, and hiking," the parallel structure enhances the flow of the sentence. In addition to literature, parallelism is also used in speeches and everyday communication. It can make arguments more persuasive and engaging. A famous example is Martin Luther King Jr.'s "I Have a Dream" speech, where he repeats the phrase "I have a dream" to reinforce his vision for equality.