Which symbol in the story contributes most to this theme and why

The symbol in the story contributes most to the theme is Mangan's sister because she represents domesticity and routine to the narrator. I hope my answer has come to your help.

Explanation:How does the symbolism express the theme of “Araby”? ... In "Araby," Joyce employs much religious symbolism to bring one of his major themes to fruition: the incongruity of the secular and the sacred.

here is the answer its my picture of my notebook