Answer: Sensory reduction
Step-by-step explanation:
The sensory reduction is the process of analyzing and also the filtering of the various types of incoming sensations and it basically providing the efficient feedback to our brain for recognition of the interaction process in the environment.
According to the given question, the Caleb and the amara wake instantly when their child whimper and not by the other sounds and noise. This given example best illustrating the concept of sensory reduction.
Therefore, Sensory reduction is the correct answer.