Final answer:
The forceful and dramatic overdub at the end of the last song refers to an audio technique used in music production to enhance the overall impact and conclusion of the piece.
Step-by-step explanation:
The forceful and dramatic overdub at the end of the last song refers to an audio technique used in music production. An overdub is an additional recording added to a track after the original recording has been made. In this context, the overdub at the end of the last song is likely a powerful and intense musical element that enhances the overall impact and conclusion of the piece. It could involve added instrumentation, vocals, or sound effects to create a dramatic effect.