Final answer:
During the Second Industrial Revolution, child labor was a prominent social problem faced by Americans. It was addressed through government regulations that placed restrictions on child labor and required minimum working ages.
Step-by-step explanation:
One of the prominent social problems faced by Americans during the Second Industrial Revolution was child labor. Children as young as five were forced to work long hours in dangerous conditions, often for very low pay. To address this issue, government regulations were introduced. The first federal law limiting child labor was the Keating-Owen Act of 1916, and it was followed by other laws over the years that placed restrictions on child labor and required minimum working ages.