I believe it would be C) Cellulose. As this is one of the essential components found in the cell wall of plant cells.
 
        
                    
             
        
        
        
The iris I the first part of the eye that light hits.
        
             
        
        
        
A.photosynthesis because algae is a type of plant.
        
                    
             
        
        
        
Answer:
c) Having a small population size
Explanation:
Endangered species are generally those whose population is declining or in a very limited range. Some of other characteristics of endangered species may also be habitat loss, indiscriminate hunting by man or predators, and disease.