Final answer:
During the broad-spectrum revolution, humans diversified their diet but didn't primarily focus on hunting mammoths, which were not a reliable source due to their dwindling numbers.
Step-by-step explanation:
During the broad-spectrum revolution, humans did not shift their attention to mammoths. This revolutionary period was marked by a diversification of human diet and subsistence strategies where different types of flora and fauna were exploited by human populations to increase their chances of survival. While humans adjusted their hunting and gathering techniques based on their environments, exploiting a variety of smaller, rapidly reproducing, and small-bodied animals, the hunting of large animals like mammoths likely contributed to their decline and were not the primary focus during this time. Evidence suggests a shift towards a diet that included fish, birds, insects, and smaller animals, which were abundant and reproduced quickly, making them a more reliable food source than larger animals.