What is the name for a bowl-shaped hollow structure carved by glacier in the mountain?

The correct answer is: Cirques

The correct option is b) Cirques.

• Glacial cirques, locally known as collies, are a feature of extensive erosion common to many mountainous regions.
• Classical curls take the form of armchair-shaped troughs with steep head walls (often culminating in sharp crests or ridges) and gentle slopes or sharply depressed valley floors.
• In active glacial landforms, the cirque is an important catchment area for snow cover.
• They may host small Karl glaciers trapped in bedrock cavities or serve as headwaters for larger valley glaciers.