What is the biosphere and how does it differ from other shells?

The biosphere is the outer shell of the Earth, inhabited by living organisms and transformed by them. The biosphere includes all other shells.
At present, living organisms inhabit all the earth’s shells: air (atmosphere), water (hydrosphere) and stone (lithosphere), forming a biosphere, i.e., a living shell. The biosphere includes all shells.

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.