Answer:
The answer is strictly between B or D
 
        
                    
             
        
        
        
Answer:
B. The carbon cycle
Explanation:
In the carbon cycle, carbon in the atmosphere is absorbed into plants, where the plants use photosynthesis to convert that carbon into oxygen and energy for themselves. Neither of the other cycles involves a plant taking in a gas directly from the atmosphere.
Hopefully this was helpful! :)
 
        
             
        
        
        
Answer:
The correct answer is option B. the oxidation of glucose in the cytoplasm and mitochondria.
Explanation:
The catabolism is the reaction or process that involves breakdown of the larger molecules into smaller molecules. This is the one of the metabolic reaction. Such reactions releases energy.
Oxidation of glucose is a catabolic reaction that involves spliting of glucose into water and oxygen in the respiration.
Thus, the correct answer is option B. the oxidation of glucose in the cytoplasm and mitochondria.
 
        
             
        
        
        
I'm assuming you meant and frailness not fertility, in which case it is the oldest old period