Profound ecological changes occured on the earth during the Upper Paleolithic and Neolithic Periods (40,000-9,500 BC). Human and ultimately societal adaptation to these changes were immense. According to the book, why is it appropriate to label these changes

Profound ecological changes occured on the earth during the Upper Paleolithic and Neolithic Periods (40,000-9,500 BC). Human and ultimately societal adaptation to these changes were immense. According to the book, why is it appropriate to label these changes a “revolution”? I will pay 10 dollars for it Purchase the answer to view it