There is a circle of life in each species. Here is the circle for Arctic wolves. First a female Arctic wolf meets a male Arctic wolf and then they mate. A couple years later the female gets pregnant. before she has her offspring she leaves the pack and finds a separate den to give birth to her offspring. Eventually she gives birth. After the pups are a month or so the mother and pups go back to the pack. As the pups get older they learn how to survive by them self's eventually they grow up ad mate rebuilding the circle of life for them self's.