What is one reasons why economies exist?

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.

Idoubt anyone will do the essay for you but i can tell you who to do it over  you could do it over teddy roosevelt there's plenty he has done   and its interesting to learn