Adaptive radiation refers to
Adaptations due to geographical isolation
Evolution of different species from a common ancestor
Migration of members of a species to different geographical areas
Power Of adaptation in an individual to a variety of environments
As we have already discussed in Embryological Evidence -
The process of evolution of different species starting from a point in an geographical area and finally radiating to other areas of geography is called adaptive radiation. It involves the development of different functional structures from a common ancestral form. Also, the presence of homologous organs are a classic example of adaptive radiation. Hence, the correct option is (b).