I think it’s D!
In a sentence using passive voice, the subject is acted upon; he or she receives the action expressed by the verb. The agent performing the action may appear in a "by the..." phrase or may be omitted. The dog is acting upon the sentence subject (the boy), meaning it uses the passive voice.
Answer:
Literally, it means that it is snowing.
Metaphorically, it could mean that something delicate looking yet sturdy has been moved and positions in a situation have changed.
