Correct option is B
The correct answer is (b) Hard rocks.
• Gorges are deep, narrow valleys carved by rivers through hard, resistant rocks.
• Vertical erosion dominates over lateral erosion in such formations.
• Examples are common in plateau and mountainous regions.
Information Booster:
• Gorges are typical of the youth stage of rivers.
• Famous example: Indus Gorge.
• Hard rocks resist widening, resulting in steep sides.
Additional Knowledge:
• Soft sediments form wide valleys, not gorges.
• Glacial till and volcanic ash erode differently and do not form gorges easily.