EVERYTHING BEHAVES. According to the laws of physics, every element in nature has a behavior that can be studied, analyzed and predicted. Thus, an inanimate element, such as a rock, will have a behavior that will depend on the conditions of the forces to which it is subjected.
Behaviors in humans can also be observable, but the results are the consequence of a mix of automatic behaviors and conscious actions.
The complexity of the human brain can select certain routine to make automatic activities without much attention. Have you ever left your house and after a few steps you could not remember if you locked the door? When we act on automatic, our consciousness does not register movement in the memory and these behaviors may only be observable by an external observer.