What system includes the core, mantle, and crust of the earth? a. geosphere b. hydrosphere c. atmosphere d. biosphere

Four major subsystems called "spheres." --the "lithosphere" (land), "hydrosphere" (water), "biosphere" (living things), and "atmosphere" (air). 
biota- the total collection of organisms of a geographic region or a time period, from local geographic scales and instantaneous temporal scales all the way up to whole-planet and whole-timescale spatiotemporal scales. The biota of the Earth lives in the biosphere. 
photosynthesis- the process of converting light energy to chemical energy and storing it in the bonds of sugar. occurs in plants and some algae (Kingdom Protista). Need only light energy, CO2, and H2O to make sugar. 
I'm betting on D. photosynthesis, which links biological organisms to the air, land, and water.