This answer depends greatly on the time period in question, but generally speaking it is true that the presence of many rivers and mountains protected China from invaders, and allowed their culture to grow with little outside influence, with the exception of Mongolian invasions from the north.
Answer:
a set of beliefs
you can say like you have a set belief in your religion or books think of it like that
I hope this helped
The soldiers who fought for the Union side were mostly from the "North," since this was the location of the states that were primarily against the institution of slavery, as opposed to in the South.
