The climax of romeo and juliet occurrs when

The climax of Romeo and Juliet occurs when Romeo murders Tybalt in Act III, Scene I.

Explanation:

Romeo and Juliet is a play about love, but also about the conflict between the two families, Capulets and Montagues. This conflict reaches its climax in Act III, Scene I. Romeo attempts to keep his temper, but Tybalt, now Romeo's relative due to his marriage to Juliet , kills Romeo's friend Mercutio. As a result, Romeo kills Tybalt and is forced to flee. This will lead to the falling action and resolution, marked by Romeo and Juliet's death.

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.