Answer:
Since the brain regulates basic body function, advances in the CNS are critical for fetuses to reach the age of viability. Hence the correct answer basic body function.
Step-by-step explanation:
CNS is known as central nervous system. It is the part between the brain and the spinal cord. Brain is known as master part of the body. It regulates the different functions of the body.
The spinal cord is present in the back side of the body and it gives the basic structure to the body. A normal person spinal cord is straight when it gets deviated it is a symptom of a disease related with spinal cord.