The document provides biographies of four photographers: Joel Meyerowitz, Helen Levitt, Henri Cartier-Bresson, and Nick Turpin. It describes their backgrounds, influences, notable works, and contributions to photography. Joel Meyerowitz pioneered the use of color photography and published influential books. Helen Levitt photographed street scenes and children in New York. Henri Cartier-Bresson developed a passion for photography after being introduced to the Leica camera, and published The Decisive Moment. Nick Turpin studied photography and established the In-Public collective to promote street photography.