Final answer:
The sentence describing Georgiana's birthmark in 'The Birthmark' uses a metaphor, comparing the birthmark to a crimson stain on snow. The correct answer is option: B metaphor
Step-by-step explanation:
The figure of speech most prominently displayed in the sentence to describe Georgiana's birthmark in Nathaniel Hawthorne's The Birthmark is a metaphor. The birthmark is described as a "crimson stain upon the snow," comparing the redness of the birthmark to a stain on white snow without using like or as, which is characteristic of a metaphor. The intensity and vividness of the mark are highlighted through this comparison, emphasizing its significance and the emotional responses it elicits within the story.