The correct answer of the given question above would be option C. The sentence in which the prepositional phrase best modifies the verb saw is: through the window, I saw the bird flying. The prepositional phrase of this sentence is "through the window" with the preposition "through" and this modifies the verb "saw".
Answer:
B. Does the narrator sound casual or formal?
Answer:
its the 3rd one and the 4th one hope this helps u