"Weeping Willow" illustrates:

B. Pathetic Fallacy

Pathetic fallacy is a literary device in which human emotions and characteristics are attributed to nature or inanimate objects. In the context of "Weeping Willow," it suggests that the willow is associated with a sense of sadness or sorrow as if the tree itself is weeping. This is an example of projecting human emotions onto nature, which is a common use of pathetic fallacy in literature.