The revision that includes a prepositional phrase is "Since he saw that movie, he gets nervous whenever the birds sit silently on the roof and stare at him."
These are usually short words that in terms of grammar add information about the place, time, etc. where the action described takes place. Here are some examples of common prepositions used in English:
For a phrase to be classified as prepositional it should include:
The option that includes this type of phrase is "Since he saw that movie..." as it includes the preposition "since".
Note: This question is incomplete; here are the missing options:
The birds sit silently and stare. Which revision below includes a
prepositional phrase?
The birds sit silently and stare, unmoving and unblinking.
The big, black birds sit silently and stare.
The birds sit silently and stare, and he backs away slowly.
Since he saw that movie, he gets nervous whenever the birds sit silently on the roof and stare at him.
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