Which sentence contains an example of Metaphor?

Question

1. The flowers on the hill seemed to dance in the wind.
2. My little brother was a tornado tearing through the neat piles of leaves.
3. Her smile was like a ray of sunshine on a cloudy day.
4. The constant buzz of the chainsaw was difficult to tune off.

Answer 1

3. Her smile was like a ray of sunshine on a cloudy day.