I think A but I don’t know if I’m right
Answer:
1. Korea: Developed on a peninsula
2. Chinese: Developed on river valleys
3. Japanese: Developed on an archipelago.
Explanation:
Korea is known to have been developed on a peninsula because Korea projected out into a water body. It is currently divided into North and South Korea.
China has been developed on a river valley because China is formed around the Yellow River, which flows almost across China.
Japan is known to have been developed on an archipelago because Japan is on a group of island