Trees are a valuable friend of our natural life. It is also very important for Earth's survival. Trees are part of humans, animals and even the biosphere. The main function of trees is to provide fresh and clean oxygen to the animals.
Any emotion or virtue that is good for oneself and society can be called a values. To be a good citizen of society, one must have values. Good parenting, respect for the elderly, and cruelty to teachers are examples of good values that are frequently reflected in society.