Question: What American photographer and photojournalist best known for his work for the Farm Security Administration is part of the " loosely defined group of photographers who lived and worked in New York City during the 1930s, 1940s and 1950s"?

Context paragraphs:
Dorothea Lange: Dorothea Lange (May 26, 1895 – October 11, 1965) was an American documentary photographer and photojournalist, best known for her Depression-era work for the Farm Security Administration (FSA).  Lange's photographs humanized the consequences of the Great Depression and influenced the development of documentary photography.

Let Us Now Praise Famous Men: Let Us Now Praise Famous Men is a book with text by American writer James Agee and photographs by American photographer Walker Evans, first published in 1941 in the United States.  The work documents the lives of impoverished tenant farmers during the Great Depression.  Although it is in keeping with Evans' work with the Farm Security Administration, the project was initiated not by the FSA, but by "Fortune Magazine".  The title is from a passage in the Wisdom of Sirach (44:1) that begins, "Let us now praise famous men, and our fathers that begat us".

Theodor Jung: Theodor Jung (May 29, 1906 in Austria-Hungary – February 19, 1996 in California) was an American photographer, best known for his work with the Farm Security Administration, one of Franklin Delano Roosevelt's New Deal programs.  Hired for the agency in 1935, when it was still called the Resettlement Administration, he photographed life in the Great Depression.  He left the agency the following year and served as photographer for the Consumers Council, another government agency, and the "Consumers' Guide".  Later in life he served as art director and photographer for a number of publications and advertising agencies.

Russell Lee (photographer): Russell Lee (July 21, 1903, Ottawa, Illinois – August 28, 1986, Austin, Texas) was an American photographer and photojournalist, best known for his work for the Farm Security Administration (FSA).  His technically excellent images documented the ethnography of various American classes and cultures.

Walker Evans: Walker Evans (November 3, 1903 – April 10, 1975) was an American photographer and photojournalist best known for his work for the Farm Security Administration (FSA) documenting the effects of the Great Depression.  Much of Evans's work from the FSA period uses the large-format, 8x10-inch (200x250 mm) camera.  He said that his goal as a photographer was to make pictures that are "literate, authoritative, transcendent".  Many of his works are in the permanent collections of museums and have been the subject of retrospectives at such institutions as The Metropolitan Museum of Art or George Eastman House.

Marion Post Wolcott: Marion Post (June 7, 1910 – November 24, 1990), later Marion Post Wolcott, was a noted American photographer who worked for the Farm Security Administration during the Great Depression documenting poverty and deprivation.

Carl Mydans: Carl Mydans (May 20, 1907 – August 16, 2004) was an American photographer who worked for the Farm Security Administration and "Life" magazine.

Arthur Prentiss: Arthur M. Prentiss (1865 – c. 1941) was an American photographer.  Some of his photos are part of the Farm Security Administration - Office of War Information Collection held in the Library Of Congress and most of his work was developed in Oregon.

John Vachon: John Felix Vachon (May 19, 1914 – April 20, 1975) was an American photographer.  He worked as a filing clerk for the Farm Security Administration before Roy Stryker recruited him to join a small group of photographers, including Esther Bubley, Marjory Collins, Mary Post Wolcott, Jack Delano, Arthur Rothstein, Walker Evans, Russell Lee, Gordon Parks, Charlotte Brooks, Carl Mydans, Dorothea Lange and Ben Shahn, who were employed to publicize the conditions of the rural poor in America.

New York school of photography: The New York school of photography is identified by Jane Livingston as "a loosely defined group of photographers who lived and worked in New York City during the 1930s, 1940s and 1950s" and who, although disinclined to commit themselves to any group or belief, "shared a number of influences, aesthetic assumptions, subjects, and stylistic earmarks".  Livingston writes that their work was marked by humanism, a tough-minded style, photojournalistic techniques, the influence of "film noir" and the photographers Lewis Hine, Walker Evans, and Henri Cartier-Bresson; and that it avoided "the anecdotal descriptiveness of most photojournalism" and the egoism of American action painting, and indeed that it was remarkably little influenced by contemporary painting or graphic design (even though a number of its exponents had direct experience of these).  Livingston selects as key exponents of the New York school of photography Diane Arbus, Richard Avedon, Alexey Brodovitch, Ted Croner, Bruce Davidson, Don Donaghy, Louis Faurer, Robert Frank, Sid Grossman, William Klein, Saul Leiter, Leon Levinstein, Helen Levitt, Lisette Model, David Vestal, and Weegee.

Supporting paragraphs: New York school of photography Walker Evans
Answer: Walker Evans