Final answer:
The orienting response is the correct answer. It is a reflexive behavior where a person turns their attention towards a new or unexpected stimulus, such as when a parent hears a baby crying and suddenly turns towards the sound.
Step-by-step explanation:
The correct answer is d) The orienting response. The orienting response is a reflexive behavior that occurs when we turn our attention towards a new or unexpected stimulus. In this scenario, the parent was initially engaged in a phone conversation, but when they heard the baby crying in the other room, they suddenly turned towards the sound. This reflexive behavior is known as the orienting response.