The correct option is A Deforestation
Deforestation is the depletion of forest resources. Its main cause is the explosion of human and livestock population, with an increased demand for the basic needs. Ideally, one third (33%) of land of a country must be covered by forest. However in India, forest cover is only 19.43%, of which only 13% are thick forests. India is losing about 1.5 million hectares of forest covers each year. The major effect of deforestation is the lost of precious wildlife, including rare species of flora and fauna. Directly or indirectly, deforestation causes intensified soil erosion, accentuated flood, drought and pollution.