'भारत में विविध प्रकार की राहत विशेषताएं, भू-आकृतियाँ, जलवायु क्षेत्र और वनस्पतियों के प्रकार हैं।' यह कथन मुख्य रूप से देश की किस विशेषता पर जोर देता है?

What is the primary cause of land degradation in the Indian states of Gujarat, Rajasthan, Madhya Pradesh, and Maharashtra?

Consider the following statements regarding the causes and impacts of land degradation in India: 1. Overgrazing reduces vegetation cover and accelerates soil erosion. 2. Shifting cultivation always improves soil fertility in the long run. 3. Mining activities often leave land unfit for agriculture. 4. Excessive use of chemical fertilizers can degrade soil quality. Which of the statements given above are correct?