This text is organized into two main parts. The first part describes Naveena Shine's experiment and its results. What does the second part mostly describe?
A. the long-term and short-term symptoms of organ failure
B. how Naveena Shine has reacted to criticism of organ failure
C. the process by which plants produce energy
D. the process by which humans extract energy from the plants we eat
C is correct ie the process by which plants produce energy.