The reason why Jacob Riis published many photographs similar to this should be the option (4)" increase public concern over tenement conditions".
Jacob Riis was a social reformer who exposed the face of massive poor conditions by clicking the pictures of New York slums.
What are “Tenement conditions”?
In layman's word, Tenement conditions means poor living conditions without proper ventilation, access to electricity and sanitation facilities.
Therefore, option '4' is the most relevant answer, as Jacob Riis exposed the Tenement Conditions of the New York slums in the late 1880s.
Learn more about Jacob Riis, here:
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