Under the articles of confederation, the nation was governed by a
a. legislature.
b. an executive officer.
c. a supreme court.
d. a council of elders.

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.