A.) Angiosperms have flowers that attract organisms like insects, which aid in fertilization.
        
                    
             
        
        
        
Energy would have to be the correct answer
        
             
        
        
        
Unicellular organism ...................................................................................................
        
                    
             
        
        
        
They help work together because when the heart pmps blood through the body and the cells flow through the blood non stop its like a barrier of protection