Egg-retrieval behavior in geese exemplifies the principle that: animals consciously act in order to improve their reproductive success. an animal may exhibit complex-appearing behaviors when they're actually following simple behavioral rules. animals learn complex behaviors by watching and imitating others. innate behaviors may vary widely from individual to individual in a population. any stimulus can trigger a fixed action pattern.

Brandy has been given a great deal of opportunity to advance her career. she recently got a huge increase in authority and salary, and she was hired to do what she has always claimed was her dream job. however, brandy is not enthusiastic about coming to work, and when she is there, she spends most of her time complaining about how maurice got a bigger office and nicer furniture than she did. brandy’s behavior would seem to support theory.