The sheep carrying out respiration is the correct answer.
The exchange of carbon between the Earth's biosphere, pedosphere, geosphere, hydrosphere, and atmosphere occurs through the carbon cycle, a biogeochemical process. Both biological substances and many minerals, including limestone, mostly consist of carbon.
The carbon serves as the model for how carbon moves across the environment and between the many spheres.
The process of cellular respiration, carried out by the living world or the organisms, adds carbon dioxide to the atmosphere, which is present in the atmosphere as bound carbon.
The sheep engaged in respiration is the right response since cellular respiration is how carbon dioxide gets from the biosphere to the atmosphere.
The carbon cycle is one of three cycles—along with the nitrogen cycle and the water cycle—that play a crucial role in the ability of Earth to support life.
