Find the correct phrase to give this sentence parallel structure. the housekeeper's job includes , cleaning, and dusting.

A parallel structure is just using a repetitive grammatical form within a sentence. It will use the same sort of pattern of words to communicate a message. You can locate a parallel structure by looking at the use of 'and' or 'or'. 

In this case, the parallel structure here is going to be 'cleaning, and dusting'. 

Hopefully, this helps! =)