Explain divergent evolution in detail. What is the driving force behind it ?

Explanation

Divergent evolution is the evolution of a number of different forms of animals of plants froms of a common ancestral form. The driving force behind, it is adaptations to newly involved habitat and the prevalling environmental conditions there. As the original population increase in size, it spreads out from its centre of origin to exploit new habitas and food resources. In time this results in a number of populations each adapted to its particular habitat, eventually these populations will differ form each other sufficiently to become new species.
A good example of this process is the evolution of the Australian marsupials into species adapted as carnivores, herbivores, burrowers, fliers, etc. Another example is that of peritadactyl limb in mammals.
The flipper of a seal, wing of a bat, forelimbs of a male, front legs of horse and the arm of a man perform different function, but exhibit the same stuctural plan including same pentadactyl pattern of bones .