Final answer:
The Great Wall of China faced difficulties in building across rivers, transporting supplies to workers, and attracting workers.
Step-by-step explanation:
One difficulty of building the Great Wall of China was building across rivers. The wall stretches over 13,000 miles and encounters many rivers along its route. To overcome this challenge, the Chinese engineers built bridges and used boats to transport materials across the rivers.
Another difficulty was getting supplies to the workers. The wall was constructed in remote and mountainous areas, making it difficult to transport the necessary materials like stones, bricks, and tools.
Getting workers to come to the wall was also a challenge. The construction period was long, and the work was arduous. The Chinese government had to use various incentives and tactics to attract and retain workers for the project.
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