What sentence uses a prepositional phrase as an adverbial phraseThe paintings of dragons were reproduced using new techniques. The?

The sentence you provided already uses a prepositional phrase as an adverbial phrase: "using new techniques".

Here's the breakdown:

* Prepositional Phrase: "using new techniques"

* Preposition: "using"

* Object of the Preposition: "new techniques"

This phrase modifies the verb "were reproduced" by answering the question *how?* Therefore, it functions as an adverbial phrase, specifically an adverbial phrase of manner.

Let me know if you'd like to see other examples of sentences with prepositional phrases acting as adverbial phrases!