Final answer:
The literary device that uses words or phrases multiple times for emphasis is called 3)repetition. This can be seen in literature like 'The Great Gatsby', where a symbol such as the green light is mentioned throughout the novel to reinforce a theme.
Step-by-step explanation:
The literary device that represents the same words or phrases a few times to make an idea clearer is known as repetition. This rhetorical device can be seen in various literary works, where an author intentionally uses certain words or phrases multiple times throughout a text, this can create emphasis, evoke emotion, or build toward a theme or motif. For instance, in F. Scott Fitzgerald's 'The Great Gatsby', the green light is mentioned repeatedly as a motif symbolizing Gatsby's hope and dreams, appearing sporadically across different chapters.
Other rhetorical devices include similes and metaphors, which make comparisons. A simile compares two things using like or as, while a metaphor does so by stating that one thing is another. Personification is another device where non-human objects are given human characteristics.