I will give brainliest to best-decribed answer During the classical era, the growth of the middle class led to a greater demand for larger public music performances. How did this demand change the size of music ensembles, and why was this a necessary change?

Explanation:

With the better machinery, better and more instruments were made. This created better sound qualities and productivity. Sections were duplicated to make sound broader, and many musicians used this to express their emotions better. The Industrial revolution improved the living conditions of many people.