They started domesticating wheat. This wasn't their main feat however since they also started herding sheep and domesticating goats. These two enabled them to stop moving around like nomads and make a real civilization in the area which resulted in what is now known as history.
I believe the term refers to architectural styles which draw inspiration and influence from forms seen in nature. Or, architecture that is built to blend seamlessly into natural settings like cliffsides or forested areas.
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The answer is "take the time to enjoy one of America’s most beautiful views"
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