Answer: The system of cooperation known as feudalism ended around the 15th century
Explanation:
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1• The yellow River is located at China and also known as "Huang He."
2• Hadrian's Wall is located near the border between modern-day Scotland and England.
3• The Silk Road primarily refers to the land routes connecting East Asia and Southeast Asia with South Asia, Persia, the Arabian Peninsula, East Africa and Southern Europe.
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