What did Afonso share with the Portuguese merchants in Congo?

On the graph, the bottom horizontal line represents

What was a result of the use of farming machines

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.