I want to know the answer to the following question:
What kind of climate occurred in the Americas?
All the background I'm provided with is that "The majority of population groups at this time were still highly mobile hunter-gatherers; but now individual groups started to focus on resources available to them locally, thus with the passage of time there is a pattern of increasing regional generalization like, the Southwest, Arctic, Poverty, Dalton and Plano traditions.". Is that enough to answer the question?
Answer: no