Matter is constantly cycled between living and nonliving parts of the environment. Processes like photosynthesis and respiration allow the carbon cycle to regenerate needed substances by recycling Earth's atoms. A diagram of the carbon cycle is shown. Each arrow represents a process in the cycle. Which explanation best describes the process that occurs at the arrow marked B?
Responses
A Plants use carbon dioxide from the atmosphere in the process of photosynthesis to produce glucose.
B Plants release carbon dioxide into the atmosphere in the process of photosynthesis to produce glucose.
C Plants use carbon dioxide from the atmosphere in the process of cellular respiration to convert glucose to ATP energy.
D Plants release carbon dioxide into the atmosphere in the process of cellular respiration to convert glucose to ATP energy.