What is the MOST LIKELY reason why the author included information about a popular Chinese saying "Heaven nourishes and Heaven destroys."
1)To explain that the weather no longer has any serious effects on Chinese people
2)To suggest that the people of China have found ways to change their geography
3)To demonstrate the wisdom, knowledge and education of the Chinese people
4)To emphasize the contrasting effects that the climate and geography have always had on China

Yet, these barriers have their advantages, too. Chinese governments from the earliest dynasties have been forced to focus internally. Instead of trying to expand the country through conquest, China has focused on cultural and ethnic integration
read above Which word from the sentences helps you understand that barriers caused the people of China to become unified?
Advantages
Internally
Conquest
Integration

The river's basin area, about one-fifth the size of China, is home to almost 500 million people. If the Yangtze valley were a country, it would be the third most populous in the world. read above. Which word from the sentences helps you understand the meaning of “basin area”?
Home
Valley
Country
Populous

Which of the following MOST caused China to have an impact on the rest of the world?
The Tien Shan
The Silk Roads
The Yangtze River
The Tibetan Plateau