Answer:
1. Teacher.
The article mentions that Lewis Hine was a former teacher which meant that he had worked closely with kids and could therefore understand the effects of a child being made to do strainers work.
2. He used photos to bring attention to issues much like Social media does today. His photographs were also artistic like the filters used on social media.
3. ⇒ There would be extra income in the house
⇒It would make the children stronger and better equipped to face the world.
4. They did not learn to read or write.
5. Specialized skilled labor get paid the highest in society and one can usually only get to this level if they are educated which means that quitting school usually relegates a family to a lower financial status from now to the future.
