Which one of the following is just like an arm chair?

Correct option is C

Introduction
A Cirque (also known as a corrie or cwm) is a bowl-shaped depression, often with a steep headwall and a gently sloping floor, carved by glacial erosion. Due to its distinctive shape—a deep, rounded hollow with steep sides and a scooped-out floor—it is popularly described as resembling a huge amphitheater or an arm chair.
Information Booster
· Landform Type: A depositional and erosional landform created by the action of an alpine (mountain) glacier.
· Shape: A steep-sided, rounded, or semi-circular hollow.
· Description: Famously described as resembling an arm chair or amphitheater.
· Formation: Forms at the head of a glacial valley where snow accumulates, compacts into ice, and then erodes the underlying rock via freeze-thaw and plucking.
· Features: Often contains a small lake called a tarn after the glacier melts.
Additional Points
· Arete: A sharp, narrow ridge created when two cirques or two glacial valleys erode parallel to each other.
· Col: A mountain pass or saddle-like depression formed when the headwalls of two cirques meet and are eroded.
· Spur: A ridge of land jutting out from a mountain; an interlocking spur is a feature of a V-shaped river valley.