A species is the main structural unit of the taxonomy of living organisms; a group of individuals with common morphophysical, biochemical and behavioral characteristics, capable of mutual crossing, giving fertile offspring in a number of generations, regularly distributed within a certain area and similarly changing under the influence of environmental factors. An individual is a separate living organism.
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.