What caused the US to enter The Korean War 

In June 1950 communist North Korea invaded South Korea. The United States came to the aid of South Korea at the head of a United Nations force composed of more than a dozen countries. Communist China joined North Korea in the war in November 1950, unleashing a massive Chinese ground attack against American forces.

Explanation:

ur welcome

a best description that resulted a division among labor in the early farming communities in their period was there was a change in their society in terms of having social roles to develop and change that led complications and divisions in the society.