The correct options are
A Soil erosion
B Global warming
D Rise in greenhouse gases
Deforestation is the act of cutting down trees on a large scale. This leads to many long term effects. When there are less trees in forests, rains and storms tend to wash away the fertile topsoil. This erosion affects agriculture adversely. The lack of trees leads to less purification of air and an overall increase in the greenhouse gases in the atmosphere. This results in a phenomenon called global warming, which is the increase in the temperature of the planet.