Final answer:
In the 1960s, pop music audiences became more diverse with the rise of teenagers as a significant consumer group, who, due to the baby boom, had notable disposable income and marketing clout.
Step-by-step explanation:
The demographics of pop music audiences in the 1960s differed from previous decades primarily through the emergence of more diverse age groups.
Influenced by the post-war baby boom, a vast population of teenagers with disposable income and marketing power radically shifted the landscape of pop culture.
Entire industries arose to cater to these young consumers, including the music industry. Rock and roll music became emblematic of the youth's quest for identity and rebellion against the constraints of adult culture.
The 1950s and 1960s saw teenagers of various backgrounds uniting over their love of the rebellious tunes, which often blurred racial boundaries and fostered social mingling in ways that had not been seen before.
The demographic changes set the stage for a powerful youth culture, with advertisers targeting teens directly, culminating in a highly lucrative industry built around the tastes and desires of the youthful demographic.