Read the following passage and answer the question below. The Great Wall of China is one of the most remarkable feats of engineering in human history. Constructed over many centuries by various Chinese dynasties, the wall was built primarily to protect against invasions from nomadic groups to the north. Contrary to popular belief, the wall is not a single continuous structure but rather a series of walls, fortifications, and watchtowers built by different rulers at different times. Some sections were made of packed earth and wood, while later sections, particularly those built during the Ming Dynasty, were reinforced with brick and stone. Today, the wall stretches for thousands of kilometers across northern China, though many sections have deteriorated due to erosion and human activity. It remains a powerful symbol of Chinese history and draws millions of tourists every year who wish to walk along its ancient pathways. Question: What is the passage mainly about?
- A. The tools used to build the Great Wall
- B. The history and structure of the Great Wall of China ✓
- C. The population of northern China
- D. Modern tourism policies in China
Correct answer
B. The history and structure of the Great Wall of China
Explanation
The passage describes how the Great Wall was built over centuries and its structural characteristics.