innate behavior-

Instinct or innate behavior is the inherent inclination of a living organism toward a particular behavior.
The simplest example of an instinctive behavior is a fixed action or pattern, in which a very short to medium length sequence of actions, without variation, are carried out in response to a clearly defined stimulus.

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for example this new born kitten thinks that this bottle is its mother so by instinct it drinks the milk of of this bottle.

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