This type of weaving is called "Fancy", but also "Classic Tartan" or "Veronica".
An orchestra is defined as a large instrumental ensemble typical of classical music. An orchestra features bass, brass, strings, woodwinds, and percussions. In the list given above, the section that is not one of the four groups in the orchestral palette is the voices. The answer would be "voices".
Based on the title and without eve knowing the piece, I’m going to say “humorous”.
