In order to support his theory of evolutionary change, charles darwin concentrated his studies on the many species of finches in the galapagos islands. darwin noted that many of the birds had different shapes and styles of beak. what is a possible explanation for what darwin observed? a) the birds had beaks that were adapted for feeding differently. b) some birds had been injured by predators and were poor competitors. c) people had bred the bird to have beaks with varied shapes and sizes. d) the birds had different beaks because females preferred certain beak shapes over others.