Question 29:
Correct Answer: C. Pollution
Question 30:
Correct Answer: B. Historical sites contribute significantly to Vietnam's economy, but their preservation faces many challenges.
Question 31:
Correct Answer: A. deterioration
Question 32:
Correct Answer: B. Historical sites in Vietnam are threatened by urban development and tourism.
Question 33:
Correct Answer: A. It is essential to comprehend both the importance of historical sites and the difficulties they face in order to preserve them.
Question 34:
Correct Answer: D. Preserving historical sites requires balancing tourism, urbanization, and environmental conservation.
Question 35:
Correct Answer: D. Vietnam's historical sites are important for both cultural heritage and economic growth, but face challenges due to urbanization and tourism, requiring careful management for future generations.