Which research question would lead to the most information about methods public schools can use to strengthen literacy at all grade levels

Hello. You did not inform the answer options, which makes it impossible for me to give you a specific answer. However, I will try to help you in the best possible way.

A research question that could be used is "which techniques for improving and strengthening literacy are most effective for students at all school levels?"

Although this question seems very obvious, it manages to directly touch the point that the research wants to unravel, because through it can be researched the best methods of improving literacy, being possible to apply them and observe the results that they manage to promote in students of different school levels.

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.  

what are you asking? this is gibberish.