Explanation:

Chinook/Fohn winds are strong, dry and warm winds which develops on the leeward side of the mountains. These winds are formed when descending air (not ascending) becomes compressed with increased pressure. Hence, statement (b) is wrong.These winds are experienced in the valleys of the northern Alps, particularly in Switzerland in spring. The winds helps animal grazing by melting snow and fastens the ripening of grapes. It is beneficial to ranchers east of the Rockies (Canada) as it keeps the grasslands clear of snow during much of the winter.