WORLD HISTORY

Detailed explanation-1: -The ancient Chinese needed power for their machines and their jobs, including smelting iron and irrigation for farmers. About 2, 000 years ago, they began to use water wheels to provide power or transport water. This replaced the only other sources of power prior to electricity-people and animals.

Detailed explanation-2: -The east-west trade routes between Greece and China began to open during the first and second centuries B.C. The Roman Empire and the Kushan Empire (which ruled territory in what is now northern India) also benefitted from the commerce created by the route along the Silk Road.

Detailed explanation-3: -The Silk Road, where much of the trading that China participated in took place, had become one of the key factors of how Buddhism spread to China. Foreign merchants, refugees, envoys and hostages40 that passed through the Silk Road helped spread Buddhism by word of mouth.