9. Where did the finches on the Galapagos come from and how did they get to

the Galapagos?

In this answer I will talk about galapagos finches

Explanation:

Existing species had descended with modifications of pre-existing species. The main causal mechanism responsible for the diversification and adaptability of its peaks, is mainly the simple mechanism of natural selection. More specifically, the cumulative selection of small successive and adaptive changes has created each species step by step with a morphology perfectly suited to thrive in its special ecological niche.