Simple Explanation
Mountain regions में steep slopes, difficult transport, limited buildable land और harsh climate कुछ areas में settlement को restrict कर सकते हैं। यदि relatively few people large mountainous area में रहते हैं तो average density low होगी। इसलिए दूसरा विकल्प सही है। Mountains में water हो सकता है और सभी mountains permanent ice से covered नहीं होते। परीक्षा में relief and accessibility को low density के कारणों से जोड़ें। / Mountain regions may have steep slopes, difficult transport, limited buildable land, and harsh climate in some areas, restricting settlement. If relatively few people live across a large mountainous area, average density will be low. Therefore, the second option is correct. Mountains can contain water, and not all mountains are permanently ice-covered. In examinations, connect relief and accessibility with low density.
