Some birds have been seen to consume certain soils in what is called geophagy. In some cases, the soils help the birds digest toxins that occur in their diets. These birds eating soil represent a member of the
(a) biosphere consuming a component of the lithosphere.
(b) hydrosphere consuming a component of the atmosphere.
(c) lithosphere consuming a component of the biosphere.
(d) atmosphere consuming a component of the hydrosphere.
