The learning process that best suits Belinda's pleasurable feelings is Classical Conditioning.
This learning process, identified by the physiologist Iván Petrovich Pávlov, is based on the stimulus-response, that is, a living being has a certain response based on some stimuli that are related to something that it wants or reminds it of said sensation.
In Belinda's case, every time she smells Stetson cologne, which is the stimulus, her response is the feeling of warmth and comfort, brought on because of the feeling of security brought by her father.
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