The correct option is (a).
Explanation
The Western Ghats are a continuous mountain range running parallel to the western coast of India, forming the western edge of the Deccan Plateau. They play a critical role in the physiography and climatology of the Indian peninsula.Statement-wise Analysis:
- Statement 1 is Correct: The Western Ghats are situated perpendicular to the direction of the moisture-laden Southwest Monsoon winds. They act as a barrier, forcing the winds to ascend the slopes. This ascent causes the air to cool and condense, resulting in heavy orographic rainfall on the windward (western) side of the Ghats.
- Statement 2 is Incorrect: The Western Ghats are known by various local names across different states. They are called Sahyadri in Maharashtra, Nilgiris in Karnataka and Tamil Nadu, and Anaimalai and Cardamom Hills in Kerala. The name 'Sahyadri' is not used for the entire length of the range.
- Statement 3 is Incorrect: The average elevation of the Western Ghats is approximately 900 to 1,600 metres. It is the Eastern Ghats that have a lower average elevation of about 600 metres. Additionally, the height of the Western Ghats progressively increases from north to south.
Key Takeaway: The Western Ghats are continuous, significantly higher (900–1,600 m) than the Eastern Ghats, and are instrumental in generating orographic rainfall along the west coast.