which of the following is a behavior

Which of the following is a behavior?
A behavior is any observable action or response that is caused by a person, animal, or device, and is measurable, observable, and Repeatable. Behaviors can range from simple, such as tapping a foot, to complex, such as playing a musical instrument. Behaviors can also be spontaneous or intentional, and can be influenced by various external and internal factors. Behaviors are often shaped by the environment in which they occur and can be modified through the application of various techniques, such as positive and negative reinforcement, punishment, and extinction.