Why did the first Chinese cities develop on the North China Plain? O The North China Plain was protected from outside invasion.
O The river valleys throughout China were overcrowded with people.
O Freshwater rivers supplied wide-open and fertile farmlands.
O The Grand Canal was built to connect the North China Plain to other rivers.

Yes all of them are right

Americans often speak of their country as one of several large regions.  these regions are cultural units rather than governmental units --  formed by history and geography and shaped by the economics, literature and folkways that all the parts of a region share. what makes one region different from another? a region's multicultural heritage as well as distinct demographic characteristics like age and occupation make regions different and special. within several regions, language is used differently and there are strong dialects. there are also differences in outlook and attitude based on geography.