Answer :
A preposition is B. A word that identifies a noun or noun phrase as definite or indefinite.
The answer should be the second option.
Explanation: Preposition are functional words that show location, direction, or time. Prepositions include words like: to, of, under, for, at. For example: I saw the bowl on the table. Take that book to the library. We will arrive at seven o'clock.
Hope this helps!
-Charlie