What creates tone?

Tone, as in an element of a Story, is set by Setting and Mood. Tone refers to the tone in which a narrator speaks or a character speaks. If a narrator uses dark, heavy, depressing Words it would match the setting of a dark, stormy night and the Mood of fear and anger.

If the narrator uses Words that are light and happy such as frolic or beautiful, the setting is usually bright and favorable and the mood is likely happy and euphoric.

Tone must be carefully aligned with setting and mood to be pulled off successfully.