The value of molluscs in nature and human life

1. Participate in the cycle of substances in nature
2. Bivalves are filter feeders
3. Some are parasites of fish
4. May be intermediate hosts of the hepatic fluke
5. Some types of people eat
6. Ink source

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.