Final answer:
The prepositional phrase in the sentence is 'by the loud thunder'.
Step-by-step explanation:
The prepositional phrase in the given sentence is 'by the loud thunder'.
A prepositional phrase is a group of words that begins with a preposition and functions as a modifying phrase. It provides additional information about the subject, verb, or object in a sentence. In this case, the prepositional phrase 'by the loud thunder' tells us how the children were awakened.
Keywords: prepositional phrase, sentence, preposition, modifying phrase, subject, verb, object
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