Imagine that you are writing an essay arguing a position that you will both submit to your local newspaper's editorial board and turn in to your instructor to fulfill a class assignment. Which type of audience would this proposal have?

This proposal would have the citizens of the city as public.

Explanation:

As seen in the question above, you will write an essay taking a position on a certain topic and submit the essay to the editorial board of the local newspaper, so that a possible publication of your essay in the newspaper is discussed.

The local newspaper is one that is distributed in your city, among the citizens because it brings important news to the people of that territory. In that case, we can consider that the public that will read your text are the citizens of the city.

for the comment!

the sentence that avoid faulty coordination is:

culture, which is well represented in philadelphia, plays a major role including theatre, music, and the visual arts.  

faulty coordination occurs when the writer gives equal importance two different ideas (clauses) which in fact are not equivalent. in order to correct a misplaced clause or idea, the writer can place less important or emphatic ideas in a relative clause as in the previous sentence.