Tom says that a preposition shows position. Ann says that a preposition shows the logical relationship between ideas. Here D. Both Tom and Ann are correct.
Prepositions are used to express the relationship between two or more places, persons or time or express a relationship in time or space.
The Last Time I met him was opposite the cinema. - place
I think hes telling her that no one can change who she is or something,or maybe the fact that no one can get her information online and she has to be safe?