Asap.. what generalization can you make about the shift in the center of population between 1840 and 1930? what change in the population could account for this shift? plz ; -;

The Song Dynasty. it was prosperous in many respects of the society. In agriculture, the productive technology was improved which promoted the output of food; in handicraft industry, the division of labor became more detailed which made the  handicrafts technology reach an advanced level; additionally, the development of the commodity economy exceeded the previous level. Particularly, the earliest paper currency appeared at that period.

In my honest opinion , i’d say franklin d roosevelt was a president that impacted our nation , i say this because fdr is voted among top three best us presidents and he was the longest serving president by 3 terms , usually presidents only supposed to have two terms increments of 4 years , equivalent to 8 years total before election time. and he established the fdic , through the 1933 banking act and he established the us , social security system , during his presidency, and established a national minimum wage , through the fair labor standards act , fdr led the allied coalition to victory in wwii and he played a major role in the creation of the united nations.