Why is the Peninsular Plateau called a stable part in India's physical structure?

Correct answer: Because it is made of ancient hard rocks

The direct answer is A: the Peninsular Plateau is made of ancient hard rocks. The Peninsular Plateau is one of India’s oldest geological landmasses. It contains very old crystalline, igneous, and metamorphic rocks that have remained comparatively stable for a long period. Reasoning step by step: a stable landform should not be made mainly of newly deposited loose material; examine its geological foundation; the plateau consists of old, compact, resistant rocks; therefore option A explains its stability. Option A is correct because hard ancient rocks resist major deformation and give the plateau a stable character, although erosion and smaller changes still occur. Option B, new alluvium, describes recently deposited river sediments of the plains, which are not the basic material of the plateau. Option C, covered with ice, is false because most of the plateau has a warm tropical climate and is not an ice-covered region. Option D, floating in the sea, is scientifically wrong; land does not float as an island in that sense, and the plateau is part of the Indian mainland. Memory cue: “old hard rock means stable plateau.”