Final answer:
In the third movement of the Violin Concerto in D, the violin commences with the theme, setting the emotional tone like a soundtrack in a film. The violin's thematic material is crucial in connecting with the audience's emotions.
Step-by-step explanation:
The third movement of the Violin Concerto in D, like many classical pieces, relies on a strong thematic statement. In terms of dramatic effect, musical themes often play a role similar to that of a soundtrack in a movie, where they can underscore the mood and evoke specific emotions in the audience.
The constitution of a theme in musical compositions generally involves the solo instrument, such as the violin in a concerto, introducing and developing the thematic material. This thematic development can be compared to various scenarios, such as a literary passage where the protagonist experiences a gamut of emotions in response to a situation, or a scene in film where the music crescendos to highlight a moment of tension or impending danger.
In the excerpt provided, the violin playing the theme represents the protagonist's emotions, much like the sound of the violoncello or the key'd cornet can represent the inner feelings of a character in a poem or novel.