What are rudiments and atavisms? Give examples

Rudiments are organs that have lost their biological significance, but are partially or completely preserved in humans, for example: tail vertebrae, ear muscles, hair on the body.
Atavisms are the manifestation in a person of signs characteristic of animal ancestors, for example: multi-nipple, tailed, excessive body hair.

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.