Artificial selection is selective breeding forced by man, and natural selection is done to survive
Because there will eventual reach a point where the food or some other necessity runs out and instead of growth continuing, it stays at relatively constant.
The cpt® code reported for the reprogramming is 92604, which is Subsequent reprogramming. Current Procedural Terminology (cpt) is a medical code set that is used to report medical, surgical, and diagnostic procedures and services to entities such as physicians, health insurance companies and accreditation organizations.