Competition is a rivalry where two or more parties strive for a common goal which cannot be shared: where one's gain is the other's loss. Competition can arise between entities such as organisms, individuals, economic and social groups, etc. The rivalry can be over attainment of any exclusive goal, including recognition.
Competition occurs in nature, between living organisms which co-exist in the same environment. Animals compete over water supplies, food, mates, and other biological resources.
