The value of annelids in nature and human life.

1. Provide the circulation of substances in nature
2. Earthworms process and fertilize the soil, increasing fertility.
3. Leeches are used for treatment

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.