What does this tree do?

Trees can carry out photosynthesis to provide oxygen for the atmosphere and provide wood, food, medicinal materials and industrial raw materials (such as rubber and paper pulp) for human beings. Shelterbelt formed by trees can prevent wind and fix sand, and forests can improve local climate. It can also beautify the environment for people to watch, shade people, silence and remove dust, and human beings can't develop and evolve to this day without fire. From ancient times to modern times, the main fuels are wood and coal, both of which are sources.