Final answer:
Natural selection in Galápagos finches was caused by a changing environment and limited resources.
Step-by-step explanation:
The correct answers are:
- The environment caused the genetic makeup of the finches to change. Natural selection occurs when a particular environment favors certain traits. In the case of finches on the Galápagos Islands, different types of beaks evolved based on the availability of food sources.
- The finches had no natural predators, overpopulated, and were forced to find new things to eat. Overpopulation and scarcity of resources can lead to competition among individuals, favoring those with adaptations that give them an advantage in obtaining food.
Crossbreeding and genetic engineering are not relevant factors in this situation.
Learn more about Natural selection and evolutionary adaptation in Galápagos finches