 Selection by consequences. That's how behavior is modified. You engage in a behavior, the effect of that behavior is called a consequence. If that consequence is punishing, the behavior is going to reduce in the future or be less likely to occur. If the consequence is reinforcing, the behavior will be more likely to occur in the future. Selection is important because it implies that the environment has the power, not the organism engaging in behavior, until you start to talk about self-management. Pause. Side effect. Whatever. Side note. Go into that other videos and if you want no pause and I'll wait for you, no I won't. Anyway, the point being that selection by consequence is the consequence, the act, the result of your actions. Influence your behavior. Behavior is selected for, just like species are. It is another layer of natural selection. There are three layers of it. We'll talk about that at another time. But selection of behavior happens within your lifetime. It is the ontogenic responses that you engage in and in fact ontogeny is selection by consequences. The behavior that you just, it's the behavior that you do has been selected for. It's really all there is to it. It's super easy if you understand natural selection.