Which phrase best illustrates a metaphor?

The choice that best illustrates a metaphor is the phrase "The night sky is a blanket of stars." This phrase directly compares the night sky to a blanket, suggesting that the stars are spread across the sky in a way that resembles how a blanket covers something. This comparison does not use "like" or "as," which would indicate a simile. Rather, it implies that the sky envelops the stars in a cozy, comforting manner, enhancing the imagery and emotional impact of the description.

In contrast, other phrases like "Her laughter is music to my ears" and "He is as brave as a lion" use similes or descriptive comparisons that rely on a form of analogy rather than a direct metaphorical assertion. "The stars danced playfully" creates imagery and personification rather than establishing a metaphorical comparison. Hence, the metaphorical quality of the chosen phrase effectively captures the essence of what a metaphor does by creating a vivid image that does not require literal interpretation.