The Lithosphere contains all of the cold, hard, solid rock of the planet's crust, the hot semi-solid rock below the crust, the hot liquid rock near the center of the planet, and the solid iron core. The biosphere is the sphere that contains all of the Earth's living organisms. The organisms and crust interact through events between spheres, such as natural events like floods, shifts in the Earth's crust. Some event as such could create soil erosion resulting in decreased vegetation and increase death of organisms.
The crust of our planet provides a physical surface on which organisms can live; it is as varied as ocean basins, mountains, valleys, sand covered deserts or the frozen poles. Organisms derive the nutrients they need from that environment, either directly or by means of other organisms, for example when plants absorb minerals from the soil which are later passed on to herbivores, carnivores and detritivores. Water is also absorbed by organisms from their surroundings. But this relationship works the other way around as well. Organisms excrete organic carbon and minerals which are returned to the lithosphere or hydrosphere and thus a cycling of minerals and water is formed which assures that essential nutrients won't run out and this way we can see that both components, the living organisms (the biosphere) and the crust (the lithosphere) are inestricably interrelated.
