Tamil Nadu’s forest cover is approximately:

Less than 10% of its geographical area
15-20% of its geographical area
25-33% of its geographical area
More than 35% of its geographical area

The correct answer is: b) 15-20% of its geographical area.

Tamil Nadu’s forest cover is approximately 15-20% of its geographical area. This is lower than the national average of 21.7%. The state’s forest cover has been declining in recent years due to deforestation and other factors.

Option a) is incorrect because Tamil Nadu’s forest cover is more than 10% of its geographical area.

Option c) is incorrect because Tamil Nadu’s forest cover is less than 25% of its geographical area.

Option d) is incorrect because Tamil Nadu’s forest cover is less than 35% of its geographical area.