1. Unhealthy housing conditions: Riis describes the crowded and unsanitary conditions in which many immigrants lived, with multiple families sharing small apartments and no access to proper ventilation or sanitation. This is consistent with the textbook's discussion of the housing problems faced by immigrants in the late 19th century.
2. Poverty and inequality: Riis highlights the extreme poverty and inequality that existed in New York City, with the wealthy living in luxury while the poor struggled to survive in overcrowded slums. This is in line with the textbook's discussion of the growing economic inequality in the United States during this period.
3. Social and economic exploitation: Riis describes how immigrants were often exploited by landlords and employers, who took advantage of their vulnerable position to charge high rents and pay low wages. This is consistent with the textbook's discussion of the exploitation faced by immigrants and the challenges they encountered in finding employment.
4. Lack of government intervention: Riis criticizes the lack of government action to address the problems faced by immigrants, arguing that the government had a responsibility to protect its citizens from exploitation and unsanitary living conditions. This is in line with the textbook's discussion of the limited government intervention in social and economic issues during the late 19th century.