What impact did the building of canals have in China during the Song and Tang dynasties?
1. The canals made it easier for neighboring nations to attack China.
2. The canals connected waterways which increased trade.
3. The canals allowed for faster transportation of goods and resources throughout the empire.
4. The canals facilitated the movement of troops and military supplies, aiding in the defense of the empire.
5. The construction of canals contributed to the economic prosperity and growth of urban centers along the waterways.