Explain HOW various environmental factors contributed to the development of the global economy from 1750-1900. (How did the IR in western nations create a demand for raw materials abroad, and the impact of extrapolating those materials from their native geographic region?).

A. describe the model of urban structure most often observed in mega-cities in developing countries. explain how this model differs from common urban structures in north america. b. describe at least two factors leading to the growth of mega-cities in developing or least-developed countries. c. identify and explain two factors that led to the formation of squatter settlements in mega-cities in developing countries.