Final answer:
Vivaldi's 'La Primavera' from 'The Four Seasons' is performed by a chamber orchestra consisting mainly of string instruments, with woodwinds, brass, and percussion as typical missing instruments.
Step-by-step explanation:
The student's question seems to refer to Antonio Vivaldi's La Primavera (Spring) from The Four Seasons. This piece is typically played by a chamber orchestra that consists of string instruments including violins, violas, cellos, and basses. In a full orchestra setting, other instruments like woodwinds, brass, and percussion might also participate, but in La Primavera, these are the missing instruments since it is written for strings and continuo. During the Baroque era, when Vivaldi composed this concerti, the chamber orchestra was a common ensemble size. In contrast, orchestral compositions from later periods such as the Romantic era featured larger ensembles with a wider variety of instruments due to enhancements in instrument design and performance capabilities.