Musical composition refers to the process of creating and arranging music, which includes the structuring of melodies, harmonies, rhythms, and other musical elements to form a coherent piece. In the 18th century, this practice evolved significantly, reflecting the cultural shifts of the time, particularly with the emergence of new styles like the Classical period. Composers began to emphasize clarity, balance, and form, leading to notable advancements in orchestration and the establishment of distinct genres.