Answer:
The correct answer is - loss of soil moisture east of mountain ranges.
Explanation:
Air or wind with moisture moves towards the top of the mountains where it precipitates and condenses before crossing the mountains and when this air crosses there is no moisture left in them to precipitate on another side.
The other side called rain shadow and is forced to become the area desert in the long run which is called the rainshadow effect. The major effect of the rainshadow effect is the formation of the deserts in a natural way.
The total volume of the gas-exchanging region in the lung is called alveolar volume.
The alveolus is an air sack-like organ in the end of the respiratory airway. The alveolus is the site where gas-exchanging happens, so only air inside alveolus that will undergo actual exchange. Air in bronchus or trachea wouldn't do exchange
