The correct option is (a).
Explanation
The Tibetan Plateau, often referred to as the "Roof of the World," is a vast elevated plateau in Central Asia and East Asia. Its formation is a result of the tectonic collision between the Indian and Eurasian plates, classifying it as an intermontane plateau rather than a volcanic one.Statement-wise Analysis:
- Statement 1 is Correct: The Tibetan Plateau is the highest and largest plateau in the world. It covers a vast area of approximately 2.5 million square kilometers.
- Statement 2 is Incorrect: The average elevation of the Tibetan Plateau exceeds 4,500 metres (approx. 14,800 feet) above mean sea level. It is significantly higher than 1,000 metres.
- Statement 3 is Incorrect: The Tibetan Plateau is an Intermontane Plateau, meaning it is enclosed by mountain ranges (the Himalayas to the south and the Kunlun Range to the north). It is formed by continental collision and uplift, not by volcanic activity. Consequently, it is not characterized by volcanic black soil; that characteristic is typical of volcanic plateaus like the Deccan Trap in India.
Key Takeaway: The Tibetan Plateau is the world's highest intermontane plateau formed by tectonic collision, with an average elevation exceeding 4,500 metres, distinct from volcanic plateaus.