Question: How does the biosphere depict the interrelationship of the four environmental "spheres" of Earth? Need Assignment Help? View Available Hint(s)for Part A The biosphere has a distinct boundary separating each of the other "spheres," so that interrelationships occur along a narrow and well-defined margin. The biosphere is a closed system in constant equilibrium with the other "spheres," which are also closed systems. Life forms of the biosphere depend on and exist in the other spheres of the environment. They each represent separate systems receiving inputs, producing output, generating feedback, and achieving equilibrium. The biosphere is an open system, whereas the other "spheres" are closed systems that are in equilibrium with the biosphere.