What are the 4 principles of natural selection?

There are four types - sometimes considered three - of natural selection, classified according to the individuals who survive in each type of selection, that is, according to how many survive: Stabilizing selection. Directional selection. Disruptive selection or balanced selection. I hope I have helped you with this and sorry if not

For you to be sure whether it is high pressure in the breathing system or to confirm the percentage of air which is taken in and out by the patient