On what basis do Darwin's finches differ from each other?

Write and explain the conclusion Darwin arrived at after observing the variation seen in the beaks of finches during his sea voyage.

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

Given below are two statements with respect to homologous organs.
Statement $I$: These organs are structurally similar but perform different functions.
Statement $II$: Differences in homologous organs are examples of adaptive radiation.
In the light of the above statements,choose the correct option from the list given below.

Adaptive radiation refers to

When two species with different evolutionary lineages resemble each other,it is a result of adaptation. What is this phenomenon called?