Answer:
I can't answer 13, but 14 is silk, ancient China kept secret the way to make silk because (15) it gave them an advantage in trade (the silk road) because other countries would trade their goods for silk since china wouldn't tell them how to make it. Hope this helps!
 
        
             
        
        
        
Answer:
a,b,c are correct... take for example Indus valley civilization
 
        
             
        
        
        
The role of the emperor in the new government was largely
ceremonial and involved acting as a symbol of the state and the unity of the
people. Under Japan’s new constitution  new constitution, drafted by U.S. occupation
authorities in 1946 and in effect from 1947, Japan became a constitutional
monarchy. Sovereignty resided in the people and the powers of
the Emperor were severely limited.
 
        
             
        
        
        
Answer:
China is the answer for the question.