Q. Which river in Southeast Asia is recognized for experiencing historically low water levels and traverses multiple nations including China and Vietnam?
Answer: Mekong River
Notes: The Mekong River is a vital trans-boundary river in Southeast Asia, flowing through China, Myanmar, Laos, Thailand, Cambodia, and Vietnam. It is the seventh longest river in Asia and is crucial for the livelihoods of millions. Recent low water levels have raised concerns about ecological impacts and food security, largely attributed to dam constructions and climate change, affecting the Mekong Delta region significantly.