Answer: C. Maintains a balance of Earth's materials essential for all natural processes.
The geochemical cycle includes all the pathways of chemicals which takes place in the crust and surface of earth. Example: volcanic eruption. The elements like silica, iron etc comes out of the earth surface. The biogeochemical cycle includes all the natural cycles which takes place between living and non-living components of the ecosystem. Example: nitrogen cycle, phosphorous cycle, carbon cycle etc. These cycles maintains the balance of Earth's material essential for all natural processes such as photosynthesis, decomposition, sedimentation etc.
Three major forms of DNA are double stranded and connected by interactions between complementary base pairs. These are terms A-form, B-form,and Z-form DNA.
