The Andes have formed as a result of a subduction zone while the Himalayas have formed as a result of a convergent plate boundary.
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.
A. A was deposited most recently in the diagram above, as it is located in the top, showing that is the newest layer to be added.
