Answer: resposta C
Explanation: é a opção que mais condiz com a continuação do texto
The Silk Road was an ancient network of trade routes, formally established during the Han Dynasty of China, which linked the regions of the ancient world in commerce between 130 BCE-1453 CE.
Energy from a source that is not depleted when used, such as wind or solar power.
Water is the control.......
Answer:
I guess that the answer would be the 'political boundaries'