I think this is the correct answer, but let me know if it is incorrect. People were having more children per family.
Increased tensions between the countries and development of many dangerous weapons.
The correct answer is Indus.
The Yellow River was an important part of Chinese civilization.
The Tigris River was an important part of the Mesopotamia civilization, located in modern day Iraq.
The Amazon River is located in South America, and was an important part of several different civilizations.
This shows that the only correct answer can be Indus River.
Answer:
an increase in wealth, the production of goods, and the standard of living
The imperial education and examination system in China is estimated to have been founded as early as the Han dynasty (206 BCE to 220 CE), and is strongly based on meritocratic ideals that persist in Chinese education to this day.
