Final answer:
Lewis Hine was the photographer who documented child labor and working conditions during the Progressive Era, helping to raise awareness and initiate reform.
Step-by-step explanation:
During the Progressive Era, the camera was utilized by Lewis Hine to expose child labor and working conditions. Hine worked as a photographer for the National Child Labor Committee, where he used his skills in photojournalism to document and bring to public attention the harsh realities of child labor across the United States. His powerful images showed young children working long hours in dangerous factory situations, which played a significant role in raising awareness and sparking reform.