Which instrument primarily plays the main theme at the beginning of "Waltz of the Flowers"?

The main theme at the beginning of "Waltz of the Flowers," from Tchaikovsky's "The Nutcracker," is predominantly played by the violins. This choice is correct because the violins effectively convey the beautiful, flowing, and lyrical qualities characteristic of a waltz, showcasing the piece's elegant and festive nature. The violins provide a light and airy texture that is essential for the overall character of this movement, allowing it to stand out within the orchestral arrangement.

In contrast, while the French horn may feature in the orchestral score, it does not carry the primary theme at this point in the piece. Similarly, although the cello contributes to the richness of the harmony and the bass line, it is not the lead instrument for the main theme. Percussion instruments, while adding rhythmic elements and color to the orchestral texture, do not play a melodic role in this section. Thus, the violins are the clear choice for representing the main theme when the piece begins.