Final answer:
In the Classical period in Western Europe, the patronage system declined while a rising middle class of merchants and the establishment of public concerts brought about new changes in society.
Step-by-step explanation:
In the Classical period in Western Europe, several new developments emerged. One of these was the decline of the patronage system, which had previously supported artists. Another significant change was the rise of a middle class of merchants, which led to the emergence of a new audience and amateur musicians. Additionally, the establishment of public concerts provided a platform for musicians to showcase their talent.
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