What did the earliest groups of people spend most of their time doing?

Which of the following would be the most immediate effect of sanctions on a country?

How and why did british north american colonists fight a revolution to create a constitutional republic, the united states of america?

Which of these is not a criticism of the concentric zone model? it does not accurately describe cities after the rise of suburban development. it only applies to cities that grew after the development of the automobile. it assumes that inner-city areas will always be repurposed instead of abandoned. it places too much importance on the traditional central business district.