Tinbergen's four questions
Overview
Tinbergen's four questions, named after Nikolaas Tinbergen
Nikolaas Tinbergen
Nikolaas "Niko" Tinbergen was a Dutch ethologist and ornithologist who shared the 1973 Nobel Prize in Physiology or Medicine with Karl von Frisch and Konrad Lorenz for their discoveries concerning organization and elicitation of individual and social behaviour patterns in animals.In the 1960s he...

, are complementary categories of explanations for behavior. It suggests that an integrative understanding of behavior must include both a proximate and ultimate (functional) analysis of behavior, as well as an understanding of both phylogentic/developmental history and the operation of current mechanisms.

When asked about the purpose of sight in humans and animals, even elementary school children can answer that animals have vision to help them find food and avoid danger (adaptation
Adaptation
An adaptation in biology is a trait with a current functional role in the life history of an organism that is maintained and evolved by means of natural selection. An adaptation refers to both the current state of being adapted and to the dynamic evolutionary process that leads to the adaptation....

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