9. One of the best recognized city mayors presents his best practices.

The correct answer is the following.

You did not include the question. It is just a statement.

However, doing some research we can comment on the following. If the question is "What is the function of communication in this situation?" then the answer would be the following.

The function of communication in the case of a recognized city mayor that presents his best practices is to inform.

The function of information if provide data, numbers, facts, statistics, everything that informs the audience about your statements or in this case, the kind of information that supports the idea that the city's major has the best practices.