Final answer:
In Vivaldi's "The Four Seasons", the technique of 'Program Music' is evident as the music is intended to represent the moods and scenes of each season.
Step-by-step explanation:
Vivaldi employed several techniques in his work The Four Seasons, but in the options provided, "Program Music" is the most relevant. Program music is a type of music that is intended to evoke images or convey the impression of events. Vivaldi's The Four Seasons is a famous example of program music; each concerto in the set is associated with a different season, and the music is designed to represent the moods and scenes of each season. Additionally, Vivaldi also used dynamics and ornamentation to create contrasts and highlights within his music, which are typical of the Baroque era.