Which of the following sentences contains a metaphor?

The sentence "The harvest moon was a jack-o-lantern smiling in the October sky" contains a metaphor because it directly equates the harvest moon with a jack-o-lantern, suggesting that the moon has a characteristic of seeming to smile. In a metaphor, one thing is described in terms of another to create an implicit comparison, enhancing imagery and evoking emotions without using “like” or “as,” which would indicate a simile instead. This vivid imagery allows readers to visualize the moon in a more playful, whimsical way, capturing the essence of both the moon and the festive atmosphere of autumn.

The other sentences utilize different figures of speech: one employs a simile by comparing feelings to those of a child, another also uses a simile by likening leaves to confetti, while the last describes scents without making a direct comparison. Thus, the metaphor is the distinguishing element in the selected sentence.