Scientists think of the Earth as a system meaning that it consists of a number of related parts that interact in some way. The Earth's system include the Earth-Universe system, the atmosphere, the hydrosphere, the biosphere, and the solid Earth. None of these systems operates the isolation; all interact to some degree. Habitat of the Earth are found in all of the following EXCEPT : a. desert b. deep ocean c. the Earth's mantle d. the lower atmosphere