Their brains has grown 4 years old
I would go with D
Explanation: seems most logical
D. Coordinates voluntary movements such as running.
In the human brain, the cerebrum is the uppermost region of the central nervous system. The cerebrum consists of the cerebral hemispheres and accounts for two-thirds of the total weight of the brain. It is responsible for the integration of complex sensory and neural functions and the initiation and coordination of voluntary activity in the body.
Answer:
The muscular system consists of various types of muscle that each play a crucial role in the function of the body. Muscles allow a person to move, speak, and chew. They control heartbeat, breathing, and digestion. Other seemingly unrelated functions, including temperature regulation and vision, also rely on the muscular system.
All of the above
