I think it’s A (low water content foods)
        
             
        
        
        
Answer:
Aerobic respiration is the process of producing cellular energy involving oxygen. Cells break down food in the mitochondria in a long, multistep process that produces roughly 36 ATP. The first step in is glycolysis, the second is the citric acid cycle and the third is the electron transport system.
 
        
             
        
        
        

They are further classified into: fish, amphibians, birds, reptiles and mammals.
I hope I've helped : )
 
        
                    
             
        
        
        
Answer and Explanation
Due to technical problems, I was not able to fill the answer and explanations in the corresponding boxes. You will find them in the attached files.
 
        
             
        
        
        
Answer:
Because it is a solid that has trapped air with the water molecules in cold temperature thus creating a hard solid.