Darwin's finches are excellent examples of:

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.

Darwin's finches were a good example of

In Australia,marsupials and placental mammals have evolved to share many similar characteristics. This type of evolution may be referred to as

The process of evolution of different species in a given geographical area starting from a point and radiating to other areas of geography is called ................ .

What is the name of the birds shown in the figure,and where was their diversity observed?