The treaty of nanjing (nanking), signed in 1842 after great britain easily defeated china in a war, was the first of the several that the chinese were forced to sign with foreign powers.

answer; i believe the correct answer is (favorable balance);

he sent troops to protect the students as they entered the school.

explanation:

the addition to geographic boundaries that might have  kept the people of the huang river civilization from traveling to far distance region is that they had learned about the other river valley civilizations but feared contact would bring invasion.

hope this .

plz give me brainliest!