In "A Wedding Gift," the narrator's tone is SERIOUS. The third option is correct.
A Wedding Gift is a short Story written by Guy de Maupassant.
In fiction, tone refers to the attitude of the narrator or viewpoint character toward story events and other characters. In a story with first-person, tone can also be the narrator's attitude toward the reader. In non-fiction, tone is understood as the writer's attitude toward subject matter and reader.