Final answer:
Jacob Riis's "How the Other Half Lives" is a study of the plight of the immigrant population in American cities at the turn of the century.
Step-by-step explanation:
Jacob Riis's "How the Other Half Lives" is a study of the plight of the immigrant population in American cities at the turn of the century. Riis, a Da-nish immigrant himself, documented the living conditions of the working poor in New York City slums, exposing the squalor and poverty experienced by immigrants. Through his book and photographs, Riis advocated for social reform and brought attention to the need for better housing and living conditions for the immigrant population.