The document discusses three key physical features of India: the Deccan Trap, Indian Desert, and Aravalli Hills. The Deccan Trap is a large area of black soil that extends from Gujarat to Delhi in a southwest-northeast direction. The Indian Desert is a sandy plain covered by crescent-shaped sand dunes called barchans, located west of the Aravalli Hills. It receives little rainfall of around 150mm annually and contains the lone large river, Luni, with low vegetation cover due to its arid climate.