Combined with the full text, talk about why the author regards "the tree is the history of the village"

Generally speaking, every village has a tree, the villagers love it, the tree guards the village, and the village is integrated with the big tree; The length of standing time of trees implies the length of village history, and trees are also the witness of a village's wind and rain; The growth history of the tree determines the character of the tree, and also becomes the basis for villagers to judge the value, which shows the value pursuit of the villagers; Every generation of children in the village walked by the big tree. They wrote the history of the village, and they found their good memories of the village along the tree.