Final answer:
Berlioz was a French composer known for his innovative orchestration techniques and large-scale works. He played a significant role in the development of Romantic music.
Step-by-step explanation:
Berlioz was a French composer and conductor who lived during the 19th century. He is best known for his innovative orchestration techniques and large-scale works, such as his Symphonie fantastique and Requiem. Berlioz was a key figure in the development of Romantic music, pushing the boundaries of traditional composition and exploring new expressive possibilities.