Answer:
3. wind, sunshine
4. You (implied subject)
5. ly (delicately)
Step-by-step explanation:
3. The antecedent is what their refers to, and the wind and sunshine are spreading warmth around the garden.
4. In an imperative sentence you are giving a command, so the sentence addresses "you" even though English speakers like to omit the subject.
5. Adverbs generally end in ly.