Final answer:
Living and working conditions in cities changed drastically between 1800 and 1900 due to industrialization and urbanization, leading to overcrowding and poor living standards.
Explanation:
Living and working conditions in most cities underwent significant changes between 1800 and 1900. Rapid industrialization and urbanization led to overcrowded, squalid tenement neighborhoods with poor sanitation and safety features. Workers faced dangerous conditions and low life expectancies, prompting reform movements for improved housing and neighborhood conditions.
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