Answer:
(sorry if im incorrect)
D
an organ, a level of organization that is higher than an organelle
Explanation:
So levels of structures goes : 
atom, molecule, organelle, cell, tissue, organ, organ system, organism
  
 
        
                    
             
        
        
        
Stephen Crane was both a novelist and a C. reporter, although he left that other job and became a full time writer. 
        
                    
             
        
        
        
Answer: Option C.
Cellulose.
Explanation:
Cellulose is a polysaccharide which is made up of glucose and it is an important component in plant cell wall. It give strength and rigidity to the cell wall. Cellulose make the cell walls strong. This play a regulatory role in tissues growth and provide strength. The cellulose is only found in cell wall and it's protect the cell wall.