Do you believe that, in general, child labor laws were ultimately enacted more as an economic response to adult unemployment as suggested by SoundSmart, or as an emotional response to Lewis Hine’s photography as claimed by Vox?

This is a personal question, and therefore, only you can answer it. However, we can provide an example that can guide your work:

"Although there is no right or wrong answer, I believe that, in general, child labor laws were ultimately enacted more as an emotional response than as a practical matter. An important factor in developing this emotional response were Hine's photographs of working children. However, these were not the only catalyst. Hine's photographs were taken at a time known as the Progressive Era. Social reform in many different areas was encouraged, and child labor was one of these. Other influential actors were the National Child Labor Committee and the National Consumers League. All of these approached the subject from a perspective of morality and emotion, rather than one based on practicality."