B. A period when humans learned farming and herding is the term that correctly describes the Neolithic Revolution. The Neolithic Revolution (sometimes called the Agrarian Revolution) was the wide-scale transition of many human cultures from a lifestyle of hunting and gathering to one of agriculture and settlement, allowing the ability to support an increasingly large population. There was also domestication of animals and plants during this time.
NATO was formed to B. ensure mutual protection from Communism.
NATO was created when the Soviet Union grew too strong - it was threatening to spread communism all over Europe and farther, which nobody really liked. This is why several states allied with America in order to combat the spread of such ideologies.
Napoleon believed to the principle of social reform being necessary for people to support a government