The answer in the space provided is anaerobic respiration.
It is because this allows of having to utilize other substance than oxygen such
as nitrate or sulfate to be their electron acceptors in which is for organisms
that undergoes respiration.
 
        
             
        
        
        
To be able to compare the results to a sample without any of the independent variable added.
        
                    
             
        
        
        
C is the answer I just check it on mine
        
             
        
        
        

A solar eclipse occurs when the Moon is between the Earth and the Sun.
The Moon casts a shadow over the Earth, fully or partially blocking out sunlight.
Because of how the Moon is positioned at these times, solar eclipses only occur during the new moon phase. However, not every new moon comes with a solar eclipse.