Final answer:
Urban renewal in the US during the 50s and 60s involved clearing slums and building new construction projects. Jane Jacobs' critique of it highlighted the disruption of existing communities and the inadequate support for displaced residents.
Step-by-step explanation:
During the 1950s and 1960s, urban renewal referred to the efforts of the US government to revitalize inner cities by clearing slums and replacing them with new construction projects. However, the basis of Jane Jacobs' critique of urban renewal was that it disrupted existing communities and displaced many poor and minority residents without providing suitable alternatives. She argued that urban renewal focused more on removing eyesores of poverty rather than addressing the underlying issues.