Which option best describes a simile?

A simile is indeed defined as a figure of speech that directly compares two unlike things using the words "as" or "like." This literary device enhances descriptions and creates vivid imagery by highlighting similarities between different objects or concepts. For instance, saying "as brave as a lion" or "like a rose" clearly establishes a comparison that adds depth and color to writing, allowing readers to visualize the ideas more effectively. The use of "as" or "like" is essential in forming a simile, differentiating it from other forms of comparison like metaphors, which do not use those specific terms.