What is NOT true about the "Leitmotif"?

The concept of "Leitmotif" is central to the operatic works of Richard Wagner and serves as a thematic device that conveys specific characters, themes, or emotions. The characteristic that is noted in the chosen answer reflects a misunderstanding of the role of the Leitmotif within Wagner's operatic framework.

Leitmotifs are not restricted to a single occurrence within a movement; rather, they can appear multiple times and in various contexts throughout the opera. Their recurrence allows for thematic cohesion and character development, enhancing the continuity of the narrative and emotional engagement. By reintroducing these motifs, Wagner could signal shifts in character, emotion, or action, thus enriching the audience's understanding and experience.

In contrast, the other characteristics outlined in the other options accurately describe the function and significance of Leitmotifs. They indeed represent characters or themes, provide a unifying element across different acts, and evolve throughout the opera to gain complexity, illustrating the dynamic nature of the music and its relationship to the storytelling.