In trying to figure out how to copy and paste an item into a document, Arlene could try all possible key combinations or she could check the pull-down menus, a much faster way to solve her problem. Arlene is relying on

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.