¿Cuántos años duro el periodo Preclásico? ¿En qué región se ubicaron los olmecas?
¿Qué características desarrollaron los Olmecas?​

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.

Ithink your answer is b