Answer:
How clear the birthmark is in the photo.
Step-by-step explanation:
Nathaniel Hawthorne's short story "The Birth-Mark" revolves around the birthmark on the cheek of Georgiana, the wife of the protagonist Aylmer. And in his desire to rid her of the 'ugly' mark on her cheek, he ends up killing her.
In the story, Georgiana was at first fine with the "Crimson Hand" which was her birthmark on her cheek. But once she learned and knew about how her husband Aylmer thinks of the mark, she also began to resent it. So, they planned to get it removed. But before that, Aylmer decided to take a picture of her which turned out to be more frightening for her, for "the minute figure of a hand appeared where the cheek should have been".