Answer:
Sensory adaptation
Step-by-step explanation:
Sensory adaptation is the phenomenon which occurs when sensory receptors become exposed to the stimuli for a much longer period of time.
Depending on type of the stimulus, the receptors may decrease or increase the ability to respond, and as a consequence, will develop diminished or enhanced to stimulus.
The given example is a case of sensory adaptation. In this case, the receptors decrease their ability to respond to the cold.