The height of Western Ghats progressively increases from :

Concept: The Western Ghats (Sahyadri) form a continuous mountain range running roughly north to south along India's west coast, parallel to the Arabian Sea, for about 1,600 km. Along its length, the average elevation and the height of individual peaks are not constant — they follow a broad north-to-south gradient tied to the range's geological structure as the western edge of the Deccan Plateau.

Application: Moving along the range from north to south, the elevation of its highest peaks rises steadily:

1. Northern Western Ghats (Maharashtra) — highest peak Kalsubai, about 1,646 m.

2. Central Western Ghats (Karnataka) — highest peak Mullayanagiri, about 1,930 m.

3. Southern Western Ghats (Kerala–Tamil Nadu border) — highest peak Anamudi, about 2,695 m, the tallest point in the entire Western Ghats.

So the range's height progressively rises at each stage moving south — the height increases from north to south.

Cross-check: Contrasting the other direction pairs offered:

• East to West / West to East describe the range's width — from the Konkan-Malabar coastal strip in the west to the Deccan Plateau interior in the east — not the direction along which peak height changes.

• South to East does not correspond to a continuous axis of the Western Ghats at all; the range runs along the west coast and has no meaningful eastern end of its own.

Hence, the height of the Western Ghats progressively increases from North to South, matching RSSB's official answer key for this question and NCERT's Class XI Physical Geography of India textbook, which states this pattern directly.