Each area can be viewed as a discrete system which has resulted from the mesh and interaction of the geologic, landform, soil, vegetative, climatic, wildlife, water, and human factors which may be present. ###>Chaque région constitue un ensemble distinct résultant de l'entremêlement et de l'interaction des facteurs présents : formes de relief, eau, sols, végétation, climat, faune et influence humaine.