Who is known as a skin changer the hobbit

Beorn is a fictional character created by J. R. R. Tolkien, and part of his Middle-earth legendarium. He appears in The Hobbit as a "skin-changer", a man who could assume the form of a great black bear.

Explanation:

a. the man as a ruler

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.