Final answer:
Repetition is the use of multiple times of the same word or phrase to emphasize key concepts.
Step-by-step explanation:
Repetition is the use of multiple times of the same word or phrase to emphasize key concepts. It is a powerful rhetorical device that helps convey continuity of ideas and themes, create rhythms in writing, and make important points stand out. An example of repetition is the phrase 'I have a dream' in Martin Luther King Jr.'s speech. Another example can be found in F. Scott Fitzgerald's 'The Great Gatsby,' where a green light appears repeatedly throughout the text.