Question

the nervous system’s command center is the _____.
options: brain, spinal cord, trachea, kidneys

Explanation:

To solve this, we analyze each option:

• The brain is the command center of the nervous system, controlling and coordinating body functions.
• The spinal cord transmits signals but isn't the command center.
• The trachea is part of the respiratory system.
• Kidneys are part of the excretory system.

So the correct option is the one with "brain".

Answer:

A. brain