Final answer:
An opera is a form of musical theater that combines music, acting, and singing. It often includes arias, which are solo vocal pieces that showcase the singer's skills and emotions. If P and G are characters in an opera, and the opera includes aria, it means that these characters have solo vocal moments that are important to the story and music.
Step-by-step explanation:
An opera is a form of musical theater that combines music, acting, and singing. It often includes arias, which are solo vocal pieces that showcase the singer's skills and emotions. P and G may refer to the characters in a specific opera, but without further information, it is difficult to determine the exact context. However, if P and G are characters in an opera, and the opera includes aria, it means that these characters have solo vocal moments that are important to the story and music.