Final answer:
Symphonie Fantastique employs the technique of 'ideée fixe', a recurring theme introduced by Hector Berlioz which represents the beloved throughout the symphony as part of the Romantic music era's expressive and dramatized composition style.
Step-by-step explanation:
Symphonie Fantastique is a multi-movement symphony that greatly employs the technique of ideée fixe. This technique, introduced by the composer Hector Berlioz, involves a recurring theme that represents the protagonist's beloved throughout the symphony. The recurring theme undergoes various transformations depending on the mood, situation, or location represented in each of the movements. The use of ideée fixe in Symphonie Fantastique is a hallmark of Romantic music, which was known for its powerful drama and expression of human emotion. The movement also reflects characteristics such as the use of expanded orchestras, dynamic contrasts, and new instrumental techniques to evoke a broad spectrum of feelings within the listener.