Answer: B. Buoyancy
Explanation: The asthenosphere exerts a buoyant force that pushes up against the lithosphere, and this force resists gravity. The theory of isostasy refers to an equilibrium in buoyancy between the lithosphere and the asthenosphere.
The Gobi Desert spans across Mongolia and China. It specifically runs across northwestern and northern China and Southern Mongolia. The Gobi is a large desert region in Asia and is a rain shadow desert formed by the Himalaya range blocking rain-carrying clouds from the Indian Ocean from reaching the Gobi territory. The Gobi is most notable for it being the location for several important cities in the Silk Road and as part of the Great Mongol Empire.
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