The nervous system consists of neurons throughout the body, all of which can communicate with one another. This demonstrates the high degree of in the nervous system.

Explanation:

The nervous system is a set of cells specialized in the conduction of electrical signals. It is made up of neurons and glial cells. Neurons have the function of coordinating the actions of living beings in the animal kingdom by means of chemical and electrical signals sent from one place to another in the organism.Most multicellular animals have nervous systems with similar basic characteristics, although with a degree of complexity very variable. Only animals that do not have well differentiated tissues and organs, such as porifers (sponges), placozoa and mesozoa, lack it.

The nervous system captures stimuli from the environment, (external stimuli) or signals from the same organism (internal stimuli), processes the information and generates different responses depending on the situation. As an example we can consider an animal that, through the light-sensitive cells of the retina, captures the proximity of another living being. This information is transmitted through the optic nerve to the brain that processes it and emits a nerve signal that, through the motor nerves, causes the contraction of certain muscles in order to move in the opposite direction to the potential danger.

carbohydrates are the body's preferred source of energy.

i think the answer would be d