Cities in the United States and Canada experience many forces that change the form and character of metropolitan areas. Sometimes the changes are viewed as positive, and sometimes the changes may be seen as negative. Describe an economic force that encourages people to move into metropolitan areas. Explain ONE reason why suburbanization occurs in the United States and Canada. Explain ONE reason why gentrification occurs in the United States and Canada. Compare gentrification and suburbanization in terms of the socioeconomic impacts on an area's original residents. Explain how gentrified neighborhoods or areas of New Urbanism redevelopment can affect the larger metropolitan area's housing economy. Describe a way redevelopment using New Urbanism changes the population density of a city. Explain ONE reason that people may desire to migrate away from metropolitan areas.