Major river of southeast asia flowing through laos thailand vietnam and cambodia

The Mekong River of Southeast Asia is the major river that flows via Laos, Thailand, Vietnam, Cambodia, China and Myanmar (Burma).

Explanation:

The Mekong River flows through six countries and it is the world’s 12th longest and the 7th longest river flowing in Asia. The river is an important route of trade between Southeast Asia and western China despite the existence of waterfalls and rapids that make navigation tough. The Mekong River has a variety of plants, birds, reptiles, fish and mammal species. Its length is 3,050 miles.

b.

developed countries have tended to improve the environment, while developing countries have tended to damage it.