The rising action of Jane Yolen's The Devil's Arithmetic takes up most of the novel's action. Outside of the introduction, the introduction of the characters and setting, the rising action takes up the rest of the novel (outside of Hannah's "return" to the apartment doorway). It is the "walk" into the gas chambers which forces Hannah back into reality and allows the novel to descend into the falling action and conclusion.
Many times the division of the introduction, rising action, climax, falling action, and conclusion are not equal. There are times where the rising action takes up so much of the text that the climax, falling action, and conclusion seem to coincide with each other.
Therefore, the rising action contains everything from Hannah's opening the door to Elijah, her time with her "aunt and uncle," the wedding, the transportation to the concentration camps, up until Hannah's entrance into the gas chamber. Hannah's walk into the gas chamber signals the climax and immediate falling action.