What did you notice about the relationship between the food sources and the finch beaks?

I had to answer the same question and I just put the harder their food source (nuts and seeds vs berries and plants) the harder/softer and more tactical the beaks are for their food type

Darwin noticed that fruit-eating finches had parrot-like beaks, and that finches that ate insects had narrow, prying beaks. ... Later, Darwin concluded that several birds from one species of finch had probably been blown by storm or otherwise separated to each of the islands from one island or from the mainland.

The answers are 3.c kelvin4.b liquids only