Concept:Deforestation:Deforestation is the process of removing trees from forests (or other places) on a big scale in order to facilitate human actions.It is a major environmental issue.Some of the major causes of deforestation are:Agriculture.Logging.Mining and urban expansion.Explanation:Consequences of deforestation:?Deforestation increases the temperature and pollution level on the earth.It increases the level of carbon dioxide in the atmosphere.Groundwater level also gets lowered.Deforestation disturbs the balance in nature. Moreover, there will be increased chances of natural calamities such as floods and droughts.Deforestation leads to global warming as carbon dioxide the heat rays reflected by the earth.The increase in temperature on the earth disturbs the water cycle and may reduce rainfall, this could cause droughts.Deforestation also leads to a decrease in the water holding capacity of the soil.Thus, (a) Increase in atmospheric temperatureCorrect(b)Increase in the level of CO2 in the atmosphereCorrect(c)Increase in groundwater level Incorrect(d)Increases chances of natural calamities such as floods and droughtCorrectOptions (a), (b) and (d) are consequence/s of deforestation.