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One role Korea had in the development of East
Asia was
(1) protecting China from a Japanese invasion
along China’s western frontier
(2) challenging Japan for control of Southeast
Asian islands
(3) allying itself with the Vietnamese to conquer
China
(4) passing cultural ideas from China to Japan

Sagot :

(4) passing cultural ideas from china to japan
korea is located right between china and japan so it was considered a cultural bridge
hope this helps!

One main role that Korea played in East Asia's development was (4) passing cultural ideas from China to Japan.

What did Korea do?

For centuries, Korea has acted as the middleman between Japan and China such that so much information has flowed to the two nations thanks to Korea.

This is the case because Korea is quite close to Japan and shares a border with China.

In conclusion, option D is correct.

Find out more on Korea at https://brainly.com/question/4209942.