Final answer:
The focal point of Wagnerian music drama in the voice is the leitmotif, a recurring musical theme that represents specific characters or ideas and is used to structure the opera.
Step-by-step explanation:
The focal point of Wagnerian music drama in the voice is the leitmotif. A leitmotif is a recurring musical theme associated with a particular person, place, or idea, which Wagner used extensively in his operas. Unlike traditional operas that may focus on arias and recitatives, Wagner's music dramas integrate the orchestra and vocal lines deeply, using leitmotifs to provide a rich, narrative structure that weaves through the drama, connecting and unifying the musical and theatrical elements.