The correct answer is B. The foehn.
A foehn is a dry, warm downslope wind that occurs in the lee of a mountain range. The foehn is caused by the air being forced to rise over the mountains, which causes it to cool and lose moisture. As the air descends on the leeward side of the mountains, it warms and dries.
The foehn is a common phenomenon in the Alps, and it can cause significant changes in the weather. The foehn can cause the temperature to rise by as much as 20 degrees Celsius (36 degrees Fahrenheit) in a matter of hours. It can also cause the humidity to drop to very low levels, which can make the air feel very dry and dusty.
The foehn can be a dangerous wind, as it can cause avalanches and other problems. It is important to be aware of the foehn when planning activities in the Alps.
The other options are incorrect.
- The Chinook is a warm, dry wind that occurs in the Rocky Mountains.
- The sirocco is a hot, dry wind that occurs in North Africa.
- The loo is a hot, dry wind that occurs in India.