The Galapagos archipelogo consists of volcanic islands that formed within the last 5 million years. Darwin wrote of the finches on these islands: "-from an onginot poucity of birds in thes archipelago, one species hos been taken and modified for different ends." The Galapagos finches are an example of adaptive fadiation driven by a. plysiological innovation. b. morphological inovation. c ecological opportunity. d. behavioural innovation. .