Deforestation, Desertification and Urbanization are very closely related phenomenon whose cause and effects are briefly discussed below.
Step-by-step explanation:
Deforestation is caused due to cutting of trees for economic purposes and other poachers.
Deforestation effects the natural habitat of the animals of forests leading to endangering of different plants and animals. It also reduces diversity of environment, causes global warming, change in climate, rainfall patterns etc.
Desertification is caused due to deforestation, due to natural calamities like forest fires, overgrazing and even due to over population.
Desertification causes a huge loss to environment. Erosion of soil, deepening of ground water levels, loss of rainfall, draught are common. Rise in temperature and change of climates are also seen.
Urbanisation is caused by main two reasons - over population and rural to urban migration of people.
Urbanization has several good effects like growth of technologies etc. But it also increases disease rates due to increase in pollution. Several mental stress and depression are also seen to affect urban people more than rural ones.