1) species diversity: the biocenosis of oak groves is more than a hundred species of plants and several thousand species of animals; the formation of tiers of the forest;
2) high biological productivity of oak groves;
3) branched chains and food networks: the richness and diversity of plants is the reason for the development of numerous consumers from the animal world (herbivorous, carnivorous). All species serve as a food source and habitat for numerous parasitic organisms (external and internal). The loss of any one species of animal does not significantly violate the entire system;
4) a closed cycle of substances: high productivity of plants leads to the formation of leaf litter. With litter, most of the minerals and nitrogen consumed by plants are returned to the soil.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.