Answer:
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Explanation:
They developed a new caste system
The easier it is to maintain a working product or fix a broken product, the more serviceable that product will appear. This also makes sense when you think about the different products which you have used in your life where they each have had different levels of serviceability.
Answer:
Nearby deserts and mountains affected life in ancient China by protecting them from nomad invaders and people who came to attack China.
Explanation:
It was not until the Silk road that China went around the mountains and threw the deserts to trade with other peaceful nations.
