Question

why the People at mountain regions are normally short

Answer 1

Hills are easier to climb than mountains. They are less steep and not as high. But, like a mountain, a hill will usually have an obvious summit, which is its highest point. According to the U.S. Geological Survey, there is no official difference between hills and mountains.

Answer 2

peoples at mountain have usually short height because they load very heavy weight on their back which may stops their growth