What impact did the Neolithic Revolution have on the social structures of
early societies?

This allowed people to settle down and live in one place. This led to settlements and the development of group living. Since people after the neolithic rev began living in tighter more complex social situations this also led to better and more complicated forms of communication.

Explanation:

answer; /// i believe that the correct answer is (d)the huang he river valley;

when world war i broke out across europe in 1914, president woodrow wilson proclaimed the united states would remain neutral, and many americans supported this policy of nonintervention. however, public opinion about neutrality started to change after the sinking of the british ocean liner lusitania by a german u-boat in 1915; almost 2,000 people perished, including 128 americans. along with news of the zimmerman telegram threatening an alliance between germany and mexico, wilson asked congress for a declaration of war against germany. the u.s. officially entered the conflict on april 6, 1917.