Which of the following describes hyperbole?

Hyperbole is a figure of speech that is characterized by extreme exaggeration. It is often used for emphasis or to create a strong impression rather than to be taken literally. For example, saying "I'm so hungry I could eat a horse" is a hyperbole that emphasizes one's hunger without intending to suggest that actually eating a horse is feasible or realistic.

In contrast, the other options focus on different literary devices: the first refers to a technique involving the repetition of words, the third describes a metaphor which makes comparisons directly without using comparative words like "like" or "as," and the fourth pertains to onomatopoeia, which relates to words that imitate sounds. Each of these is distinct from hyperbole, highlighting the uniqueness of the exaggerated expression that hyperbole delivers.