The correct option is A Afforestation
Large scale cutting of trees is called deforestation. Deforestation can involve conversion of forest land to farms, ranches, or for urban use. Some of the main causes of deforestation are using the land for agriculture, using wood to make paper, urbanisation (cutting down trees and using the land for construction of buildings and for other commercial purposes). Afforestation, on the other hand is planting of trees or sowing seeds, in a barren land devoid of any trees to create a forest.