Which future U. S. president wrote the document that acted as the model for the U. S. Constitution? A. George Washington
B. James Madison
C. John Adams
D. Thomas Jefferson

Ifound this on google “the existence of agglomeration economies is central to the explanation of how cities increase in size and population, which places the phenomenon on a larger scale. the concentration of economic activity in cities is one reason for their development and growth.” i hope this you for what your looking for.