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

Explanation:

Primary producers such as plants, add oxygen to the atmosphere and remove carbon dioxide.  They convert carbon dioxide and water into oxygen and carbohydrates such as sugar and starches.

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.

d. cellulose and starch