This diagram is a model of a biological process. Carbon dioxide, water, and light energy react to form carbohydrates and oxygen.

Which of the following is modeled in the diagram?

A. The role of photosynthesis in breaking apart carbohydrates for their energy
B. The role of photosynthesis in adding carbon dioxide to the atmosphere
C. The role of photosynthesis in transferring carbon from the atmosphere to the biosphere
D. The role of chemosynthesis in transferring carbon dioxide from the hydrosphere to the biosphere

C. The role of photosynthesis in transferring carbon dioxide from the atmosphere to the biosphere

Explanation:

Photosynthesis is a process in which plants (and some other organisms whose cells possess chlorophyll) transform the energy they receive from sunlight, water, and carbon dioxide into carbohydrates they use as food and oxygen, which they release back into the atmosphere. This is shown in the diagram you were given (pictured below).

Since plants are a part of the biosphere and they take carbon dioxide from the atmosphere, we can conclude that the diagram shows the role of photosynthesis in transferring carbon dioxide from the atmosphere to the biosphere.