What is the initial step to exploring solutions to a problem? modeling the solution

diagramming the solution

understanding the problem fully
breaking the solution into steps

writing the algorithm

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.