I want to know the answer to the following question:
During what period did hunter-gatherers begin to focus food collection on a more limited range?
All the background I'm provided with is that "Starting at the transition between the Middle to Upper Paleolithic period, some 80,000 to 70,000 years ago, some hunter-gatherers bands began to specialize, concentrating on hunting a smaller selection of (often larger) game and gathering a smaller selection of food.". Is that enough to answer the question?