Final answer:
The metaphor is found in option A: 'Kisses are roses in the spring.'
Step-by-step explanation:
In the given options, the metaphor is found in option A. The phrase 'Kisses are roses in the spring' is a metaphor comparing kisses to roses. Metaphors are figurative language devices that create a comparison between two unrelated things to convey a deeper meaning. In this case, the metaphor suggests that kisses are beautiful and pleasant, just like roses in the spring.