Which phenomenon allowed the pouched mammals of Australia to survive due to a lack of competition from any other mammals?

Darwin's finches are a good example of

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.

Select the correct option based on the given figure.

What do Darwin's finches represent?

Darwin's finches are related to which of the following evidences?