What caused the appearance and development in the process of evolution of the nervous regulation of body functions?

This is due to the fact that living organisms had to sharply adapt to the environment at certain points in time, for example, a person’s heartbeat in a stressful situation can increase significantly, giving him more energy to perform urgent actions (escape from a predatory animal).

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.