How did the Harrapan civilization become so successful?

Characteristics of substistence farming include all of the following except a. the use of pesticidesb. shifting cultivation c. farmers that stay in one placed. the lack of tractors and machinery

The were so closely connected to the tang dynasty that korean elites used chinese as their written language. they set up a statewide academy that trained government officials in the philosophy of .

Who was the first female secretary of state?