Answer:
Explanation:
The border largely follows two rivers: the Yalu in the south and the Tumen in the north. Both flow from the same source: a dormant supervolcano straddling the border — known to the Chinese as Changbaishan and to the Koreans as Mount Paektu.
B
The Russian Revolution
all of the above is the correct answer
The earth's plates move because of the intense heat of the mantle
