Which border is that?

between the USA and Mexico
21263
between Iraq and Kuwait
4826
between Israel and Syria
5556
between China and Russia
1144
The fence on the US-Mexican border can be adjusted to remain on top of the ever shifting sand dunes. It is a special construction of narrow, 15 feet tall elements, that are movable vertically.
correct this question
globalquiz.org
reach: rather globalbordersdesertsdeserts of Mexicodeserts of North Americageographygeography of Mexicogeography of North AmericaMexicoNorth America