The living condition for the poor and for immigrants in New York City during the late nineteenth century was truly wretched.Over one and a half million poor people lived in tenements,a form of barracks-like buildings that could house some five hundred people in a structure lacking heat and plumbing and often fatal.(1)_______________________.Real estate development was uncontrolled,resulting in factories,stories and residences springing up randomly without consideration to zoning or building codes.(2)_______________________.Some of the poor housing can be blamed on New York's rapid population growth.(3)____________________________________