What began the adaptive radiation process for finches on the

What began the adaptive radiation process for finches on the Galapagos islands? Two different species of finches mated and gave rise to a hybrid finch capable of eating different food. Genetic drift caused random changes that led to the adaptive radiation. As finches migrated from different islands, they brought unique characteristics with them. As one food source became scare, those finches who could eat other foods thrived.

Solution

As one food source became scarce, those finches who could eat other sources thrived.

One major morphological difference among finches inhabitating Galapogos islands is beak size and shape. Adaptive radiation led to the evolution of different beaks which could access different food and resources.