Answer: C
Correct answer: provides the main break in the Western Ghats between Kerala and Tamil Nadu
The Palghat Gap is a break of about 30 km in the otherwise continuous Western Ghats, between the Nilgiri Hills to the north and the Anaimalai Hills to the south. It is the principal land route between Kerala and Tamil Nadu, carrying road and rail, and it has been a corridor for trade and migration for centuries. Its climatic effect is equally important. The Ghats otherwise cast a strong rain shadow over the Deccan, but the gap lets monsoon air through, so the districts of Tamil Nadu east of it - Coimbatore and Tiruppur - receive appreciably more rain than the rain shadow would allow. That same wind is why the gap is one of India’s best sites for wind power. It also acts as a biogeographic divide: several species of the Western Ghats occur on only one side of it, which is why it features in studies of the range’s endemism. The other break, the Thal Ghat and Bhor Ghat, are passes rather than gaps.