The correct answer to the question is D.Biosphere
Every planet has it's own gravity.Hence, they have their own atmosphere.The concentration of particles and gases may vary from planet to planet depending on their force of gravity.
Every planet contains the lithosphere,the hard and rigid outer layer which contains the crust and mantle.
Earth is the only habitable planet which supports biosphere.Its atmosphere contains 20% of oxygen along with nitrogen which are responsible for sustaining various types of flora and fauna as well as evolution of new species.
