Which one of the following sentences is an example of a metaphor you are a rock b she eats like a bird?

The sentence that is an example of a metaphor is "you are a rock." In this sentence, "rock" is used to convey strength or stability, suggesting that the person is dependable or resilient, without using "like" or "as." The other sentence, "she eats like a bird," is a simile, as it compares her eating habits to those of a bird using "like."