Answer:
The Great Wall impacted the people of China because it was a great source of protection that is the main reason they built it in the first place. Without this amazing stone and brick structure protected the Han, Qin, Ming and many other dynasties could not be protected without it.
All public swimming pools should have a lifeguard on duty because not everyone can swim or someone may have an accident. The life guard who can swim should be on watch to keep those accidents from happening and prevent people drowning.
Lack of mineral resources has forced Japan to become a trading nation.