Correct option is A
H.G. Champion, a British forester, is renowned for his work in classifying the forests of India. His "Champion Classification of Indian Forests" divides forests into types based on climatic conditions, topography, and the types of vegetation found. This system is vital for forest management and conservation efforts in India, as it helps in identifying and preserving ecologically sensitive areas. Champion’s work was instrumental in laying the foundation for modern forestry practices in India, contributing to sustainable forest use and biodiversity conservation. The classification is still used today by forest departments to manage forest resources and plan afforestation programs, helping maintain ecological balance while meeting the needs of local populations who depend on these forests for their livelihoods.