The Korean word transliterated as "getbol" is Korea's term for which vital part of its shoreline ecology?

Question

"Massacre in Korea", a 1951 expressionistic painting by Pablo Picasso which is seen as a criticism of American intervention in the Korean war is drawn from the painting "The Third of May 1808", which shows Napoleon's soldiers executing Spanish civilians, by whom?

Answer 1

Tidal mudflats
In July 2021 UNESCO designated four of South Korea's getbol as a world natural heritage site.