What does the presence of a coccyx testify to?

The coccyx is a rudimentary tail region that has lost its significance in humans, and its presence speaks of the relationship between humans and other vertebrates and the similarity of origin and evolutionary development.

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.