What is a metaphor?

A metaphor is defined as a figure of speech that makes a comparison between two unrelated things, ultimately suggesting that one thing is another, often to highlight a particular quality or characteristic. This comparison helps to create a more vivid understanding of an idea or concept by linking it to something that the audience can relate to or visualize. For example, saying "Time is a thief" suggests not that time literally steals, but rather that it can take away moments from our lives without us noticing, which enhances the emotional impact of the statement.

The other choices represent different literary concepts. Exaggeration for effect, while it contributes to various forms of expression like hyperbole, does not align with how metaphors function. Non-literal language can encompass various forms, including symbolism and simile, but the specific characteristic of a metaphor is its direct comparison between two distinct entities. Lastly, a type of character refers to narrative elements, which is unrelated to the function or definition of a metaphor. This context helps clarify why the correct answer effectively captures the essence of what a metaphor is.