Why did the author include the fact that 40000 African americans participated in the bus boycott iready

to show how many people felt strongly about injustice and wanted to stand up against it.

Explanation:

umm duh they in differrnt places

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.