Which among the following are called the Darwin's finches?

What is the process of evolution of different species in a given geographical area starting from a point and radiating to other areas called?

Lemur and Spotted cuscus exhibit:

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.

When more than one adaptive radiation appears to have occurred in an isolated geographical area,it is called ...... .

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