1) There is isolation. Geographical speciation can be carried out in two main ways: by migration; by fragmentation of the range of the maternal species (due to the emergence of external conditions – the formation of mountain ranges, deserts, the descent of the glacier from the mountains).
2) Then reproductive isolation occurs – gene exchange becomes impossible.
In the new conditions, individuals begin to acquire new traits.
3) As a result of natural selection, new, useful for survival traits are passed down from generation to generation, individuals of different ranges are becoming more and more different.
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.