Development of similar adaptive functional structural features in an unrelated group of organism is called
Convergent evolution
Adaptive convergence
Both $(a)$ and $(b)$
Evolution
$A$ : Spotted cuscus and marsupial mole are the examples of marsupial radiation.
$R$ : Both are found in Australian region.
Darwin’s finches are a good example of
Darwin's finches discovered from the Galapagos
Assertion : Darwin's finches show a variety of beaks suited for eating large seeds, flying insects and cactus seeds.
Reason : Ancestral seed-eating stock of Darwin's finches radiated out from South American mainland to different geographical areas of the Galapagos Islands, where they found competitor-free new habitats.
An evolutionary process, giving rise to new species adapting to new habitat and ways of life is called