The correct answer is: C. 30%
The National Forest Policy for Plains states that the minimum area of forest cover in the plains should be 30%. This is because forests play an important role in the environment, providing a number of benefits, including:
- Watershed protection: Forests help to regulate water flow and prevent flooding.
- Soil erosion control: Forests help to hold soil in place and prevent erosion.
- Air quality improvement: Forests help to clean the air and reduce pollution.
- Climate change mitigation: Forests help to absorb carbon dioxide from the atmosphere and help to mitigate climate change.
- Biodiversity conservation: Forests provide habitat for a wide variety of plants and animals.
The National Forest Policy for Plains also states that the forest cover should be of good quality and should be managed sustainably. This means that the forests should be managed in a way that ensures that they continue to provide these benefits for future generations.
The other options are incorrect because they do not represent the minimum area of forest cover recommended by the National Forest Policy for Plains.