To give an effective oral presentation, gretchen should

Gretchen should research her project thoroughly, and keep opinions out of her presentation. She should present herself neatly, and well dressed. She should speak in a confident tone, and loud enough for every one to hear but not too loud. Her presentation should be organized, and should repeat points or move along too slowly or too fast. Her voice should be clear and easy to understand, and stuttering should be at a minimal. 

Urban growth invariably feeds increased commercialization and industrialization. it requires continually expanding land areas. when urbanization rates are high, and countries do not have the institutional and managerial capacities or economic wherewithal to manage such rapid growths, they exert intense pressure on the types and nature of the resulting settlements. they contribute to the development of overcrowded slums and shanty towns without adequate essential services and necessary infrastructure.-by asit k. biswas and cecilia tortajada