Final answer:
The investigation and publicization of problems with child labor involved figures such as Lewis Hine, Jane Addams, and Florence Kelley who played crucial roles in raising awareness and advocating for labor reforms.
Step-by-step explanation:
The investigation and publicization of problems with child labor can be attributed to several individuals and organizations during the industrialization period in the late 19th and early 20th centuries.
One prominent figure is Lewis Hine, an American photographer who documented child labor conditions through his photographs. His images were instrumental in raising awareness about the issue.
Additionally, social reformers and activists such as Jane Addams and Florence Kelley played crucial roles in investigating and publicizing the problems with child labor. They advocated for labor reforms and education for children, which eventually led to the passing of child labor laws.
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