Carbon dioxide because people in other animals exhale carbon dioxide as a waste product. People and other animals need oxygen for plants produce oxygen during an important process called photosynthesis which turns the sun energy into nutrients so carbon dioxide would be the answer.
        
                    
             
        
        
        
Answer: E. Triglyceride
Explanation:
Abnormality in the normal metabolic process may lead to the accumulation of the triglycerides in the hepatocytes of the liver. These can be seen as the clear spaces in the cytoplasm of the liver cells. This can be diagnosed with the routine H and E stain test. 
The calcium shows dark blue to purple color, hemosiderin shows yellow brown color, lipofuscin shows golden brown color.
 
        
             
        
        
        
Answer:
B. Antibiotics attack only bacteria. OR Colds are caused by viruses.
Explanation:
A.P.E.X.
 
        
             
        
        
        
I would think that is the red blood cell. I could be wrong so correct me if I am.