Which literary device is used when the weather reflects the mood of a piece of writing?

The correct answer is that the literary device used when the weather reflects the mood of a piece of writing is known as pathetic fallacy. This term specifically refers to a technique where human emotions or characteristics are attributed to nature or inanimate objects, particularly in relation to weather conditions. For instance, when a stormy scene parallels a character's turmoil, or a sunny day reflects joyful events, it is an example of pathetic fallacy at work. This device helps set the emotional tone and enhances the reader's connection to the characters' experiences by mirroring their feelings with the environment.

The other options describe different literary techniques: metaphor involves making a direct comparison between two unrelated things; personification gives human traits to animals, objects, or abstract ideas; and symbolism uses specific symbols to represent deeper meanings or themes. While these devices can enhance writing, they do not specifically capture the direct emotional correspondence found in pathetic fallacy.