Which event most directly led to the divisions shown on the map?

A but I got it from someone in the comments so give him the credit

Explanation:

the first settlements began along the huang river because of the importance of the huang river in the beginning of china. it goes back to the story, “the tale of emperor yu”, which references the tale of the great flood, which was caused by the huang river and was believed to create and influence china’s making.

answer; the edward snowden leaks of nsa classified material;