What is the central Nervous system (cns)​

the complex of nerve tissues that controls the activities of the body. In vertebrates it comprises the brain and spinal cord.

Explanation:

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The central nervous system (CNS) controls the body and mind. It consists of two parts: the brain and the spinal cord.  

The brain is the center of our thoughts, the interpreter of our external environment, and the origin of control over body movement. Like a central computer, it interprets information from our eyes (sight), ears (sound), nose (smell), tongue (taste), and skin (touch), as well as from internal organs such as the stomach.

The spinal cord is the highway for communication between the body and the brain. When the spinal cord is injured, the exchange of information between the brain and other parts of the body is disrupted.

So the point is that it is the brain and the spinal cord, through our nerves we have the ability to think and move and etc :)

Hope i helped

the answer is trees if i'm not mistaken