Do not repeat the word "identify". Replace it with a synonym.
Another reoccurring plot
that appears is the idea of money
--> what do you mean by the "idea of mony"? It looks odd to me. Suggestion: "Throughout the stroy the writer tried to show that thirst for money can overshadow everything"
the reason the step-father is stopping the daughter from marrying is so that he can retain his share in the inheritance
--> I changed the structure of the sentence as the same structure was used for the previous sentence. Use various structures.
What is the central plot, and how does it manifest in each story?
You mentioned some plots and to show how they manifest through the stroy, u used some examples. That is a good way, but I think you should not have used the phrases like "for example". In my opinion, you should say something general to show these plots do not belong to specific exsamples, while they are what the reader can feel at every sentence of the story.
Hope this helps,