Which natural feature forms much of the borderbetween Laos and Thailand?

The natural feature that forms most of the border between Laos and Thailand is the Mekong River. Mekong River is by far the biggest river in southeast Asia and by far the most important one in the region. It is also a natural feature that has set the borders between the countries in this part of the world, including these two countries.

Explanation:

wood carving remains today the primary sculptural art form of the sub saharan continent. african art history shows the earliest wooden sculptures from the 17th c are attributed to the kuba, central zaire but the earliest surviving sub-saharan sculpture is a zoomorphic head found in 1928 in central angola.

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the roman army grew in size and became dominant in the mediterranean region.