Answer:
The best way to revise the sentence to include a prepositional phrase is "To complete their trip, the honeymooners decided that they should pay a visit to the vineyard and its lovely grounds"
Step-by-step explanation:
A prepositional phrase is a group of words that don't contain either a verb or a subject but they connect ideas along with a preposition, this means that a prepositional phrase contains a preposition followed by a noun or a pronoun, "to the vineyard and its lovely grounds" is an example of a prepositional phrase.