Correct Answer - Option 3 : 1 and 2 only
The correct answer is option 3, i.e 1 and 2.
- During the day time the upper slopes are more heated due to insolation while the valley floors are protected from direct insolation.
- This creates local pressure difference and hence wind blows from valley to the mountain slopes known as valley breeze (Anabatic Winds).
- During the night time there is downward mountain breeze due to quick loss of heat from the bare mountain slopes.
- This Katabatic winds moves down valley occupies the valley floors and causes temperature inversion on the valley floors.
- Hence the majority of human settlements on mountains are located on the slopes rather than at the valley or at the top.
- The greek words anabasis means "moving up or ascend" and katabasis means "to descend".
- Statement 3 is NOT one of the reasons for the settlement to be built on mountain slopes.