Answer:
A
Explanation:
Of in the phrase of the beach is the preposition in a prepositional phrase used that is used as an adjective to describe the direction in which the bird flew. Flu is also misspelled in this original sentence and should be spelled flew. Flu is the shortened spelling for the word Influenza and is the incorrect word to use in this sentence. FYI-flew and flu are homophones, that is, words that have the same pronunciation but different meanings.
