The answer would be false
Answer: Underlined prepositional phrase
Explanation: The Prepositional Phrases can function as adverbial phrases or adjective phrases to modify other words in the sentence. In the example, " Hearing the key in the lock" and "...dashed to the front door." in and to are prepositions that are used to form the two prepositional phrases: "in the lock" and "to the front door."
