Apartments in urban tenements were -feared as the primary source of a deadly cholera
outbreak.
-cheap, but well-kept, temporary residences for recent
immigrants.
-feared because people believed that their high
poverty rates increased crime.
-commonly overcrowded, unsanitary, and unsafe for
their residents.

- commonly overcrowded, unsanitary, and unsafe for their residents.

Explanation:

The number of immigrants in the USA led to the creation of "tenements," a dwelling place that was rented by more than three families. This was started in New York city's Lower East side area, which was more populous, and later on expanded.

The extended family in tenements was so large that "overcrowding" became an issue. It failed to meet the minimum standard for providing the tenants comfort and sanitation. It was also unsafe because it was made of cheap construction materials.

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