How is the red door central to the novel as a symbol? How do descriptions of the door impact the novel’s tone?

Several characters in the novel (June, Margaret, and Annie) are represented in two different time periods. How does their characterization differ from individuals who are represented in only one time period (Mason, Eamon, Nathaniel, and Caleb)?

The Farrow curse affects only the women in the family. Why is the gendered element of the curse significant? What does its matrilineal nature contribute to the novel’s plot and tone?