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Ethology is the study of animal behavior. It is a branch of zoology that focuses mainly on the role of anatomy and physiology in determining behavior, rather than analysis of psychology. The field emerged toward the end of the 19th century and was greatly expanded upon in the 20th century as a scientific study drawing on the parsimonious approach to explain animal behavior, which aims to find the simplest motivation for behavior and, thus, avoid anthropomorphizing animals. The nature of the behaviors explored depends on the animal concerned, its sophistication and structure, and the motivations it has to act in particular ways. Consequently, the ethology of simple animals with a low number of cells is significantly different from the behavior of primates, which involves sophisticated ...

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