This occurs when a mountain range forces air to rise: frontal lifting. convergence. localized convective lifting. orographic lifting.

The easiest way of knwing the answer is trough the etymology of the words. Orographic comes from the ancient greek word oros.

Orographic lifting occurs when an air flow or air mass finds itself obligated to go over a mountain range since it cannot go trough the sides (mountain ranges are to long for that).

Hope it helped,

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