1. Breeders use artificial selection to produce better crops and livestock. It is done to get the desirable traits of the parents in the offspring. The parents are selected on their merits and traits which the breeder want to produce the better offspring.
2. The process of change over time is called evolution.
3. The traits that are most helpful for survival in an environment become more common through the process of natural selection.
4. The origin of species by Natural Selection was published by Charles Darwin.