Answer:
B) Krebs cycle (citric acid cycle)
Explanation:
Glycolysis breaks glucose into two pyruvate molecules. Pyruvate is decarboxylated into acetyl CoA and the reaction occurs in the matrix of mitochondria. In the mitochondrial matrix, acetyl CoA enters Kreb's cycle and is broken down into CO2 and H2O. For one molecule of acetyl CoA, two molecules of CO2 are released as a by-product. Therefore, out of three carbon atoms of pyruvate, two are released as CO2 during Kreb's cycle.
 
        
             
        
        
        
B . , because I remember this
        
             
        
        
        
<span>The temperature in the laboratory
            The position of the Bunsen burner
            The amount of air that mixes with the gas stream 
these can all have an affect on the intensity of the reaction. 
I hope I was helpful.</span>
        
                    
             
        
        
        
<u>Answer</u>: predator and prey
<u>Explanation</u>:
The described graph illustrates the cycle of a predator and prey population.  The population curves for predator and prey are not synchronized with each other and their amplitudes differ. 
Changes in the prey population will not result in immediate or exactly identical changes in the predator population.
In the attached image, the red line represents the prey population and the blue the predator population. As it can be observed, when the prey population increases in size, the predator population size increases too. 
However, this increase is not of the same size and is delayed in time. The predator population will continue to increase even though the prey population has started to decrease. 
This has to do with the fact that the adult predators mated and gave birth when the food availability was still high. However, these new young individuals will not survive and reproduce due to decreasing prey. As the prey continues to decrease, more and more predators will perish. 
The same cycle will then repeat over and over again. 
 
        
             
        
        
        
I know one is the immune system