Final answer:
The main purpose of this primary source document is to describe the living conditions of Bronx housewives during the 1930s.
Step-by-step explanation:
The main purpose of this primary source document is to describe the living conditions of Bronx housewives during the 1930s. The document mentions that photographer were commissioned to document social conditions during the Great Depression, and the photographs that resulted from this commission are considered both invaluable historical documents and lasting works of art. By focusing on the living conditions of Bronx housewives, the document provides insights into the experiences and challenges faced by women during this period.