Answer: The Highlands and the Red River Delta, the Central Mountains, the Coastal Lowlands and the Mekong River Delta.
Explanation:
The highlands: The country's tallest mountain, Fan Si Pan, which is 3,142 m in height, is located in the Highlands to the country's north and northwest corners, which are populated primarily by ethnic minority groups (10,308 ft).
The Red River Delta: The Red River Delta is a plain, triangular area that is 15,000 sq.km in size, while the Red River itself is 1,200 kilometers long (746mi).
The Central Mountains: Over 51,700 square kilometers of mountain peaks make up the Central Highlands. Over 15% of the country's arable land is consists of these mountain ranges, which are shrouded in lush forests.
The Coastal Lowlands: The Coastal Lowlands extend all the way to the Mekong River Basin, which begins from south of the Red River Delta. The lowlands are narrow and flat, as their name would imply.
Mekong River Delta: The southern part of the country is where Mekong River Delta can be found