Answer:
The two techniques that Mozart used in his opera "Don Giovanni" to link the music to each of his characters are interruption and pivot chord. Interruption is a musical technique in which a character's music is suddenly interrupted by another character's music. This technique is used to convey a sense of conflict between the characters and to highlight their differences in personality and temperament. Pivot chord, on the other hand, is a musical technique in which a chord is used to transition from one character's music to another character's music. This technique is used to create a sense of continuity between the characters' music and to link them together in a cohesive musical structure. By using these two techniques, Mozart was able to create a rich and complex musical tapestry that highlighted the individual personalities of each character while also linking them together in a larger musical narrative.