this is a population.
in accordance with the synthetic theory of evolution, not individual characters or individuals are selected, but the genotype of the whole population, however, it is carried out through the phenotypic characters of individual individuals. This leads to the spread of beneficial changes throughout the population. The utility of variability will be determined by the natural selection of the group of individuals most adapted to life under certain conditions. Thus, the elementary unit of evolution is no longer considered to be an individual (as Lamarck believed), not a species (as Darwin believed), but a collection of individuals of one species that can interbreed, i.e. population.
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.