Proximate cause: how a behavior occurs or how it is modified
What was the stimulus to cause the behavior?
How does the “nurture” component affect behavior (ie how do the experiences during growth and development influence the response)?
Ultimate cause: why a behavior occurs (in context of natural selection)
How does the behavior help the animal survive and reproduce?
How does the “nature” component affect behavior (ie what is the evolutionary basis of the behavior)?
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