I'm not 100% positive but it is South Korea
Answer:
I think it's because of a war they fought and they never won so they never got their independence :3
Explanation:
:3
[Density]
Density determines waters vertical position in the ocean using temperature and salinity. Lower temperature waters are more denser than higher temperature waters. Also, low salinity waters are lower density than higher salinity waters
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Best Regards,
Wolfyy :)