What happens to the music in this selection?

The correct choice indicates that the music grows in intensity and in volume, which reflects a dynamic development within the piece. This increase in intensity often involves a rise in the number of instruments being played, more complex harmonies, or a shift in the musical themes that create a sense of excitement or emotional buildup.

Musical selections frequently use crescendos—gradual increases in loudness—to enhance the emotional experience of the listener, driving the music forward and preparing for significant moments such as climaxes or transitions. This quality may also be tied to thematic development, where a motif or phrase introduced earlier is revisited with greater force, emphasizing its importance in the overall structure of the work.