Darwin's finches arose from a common mainland ancestor, but became isolated on different islands and evolved into 15 species of birds. Which type of Isolation occured?
aGeographic
Behavioral
Temporal

thinking it would be d not too sure but i think it's right

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs