Answer: C. They transport oxygen throughout the body.
It is the primary function of red blood cells.
Hope it helped!
        
                    
             
        
        
        
Answer is B in my opinion
        
             
        
        
        
The first organisms to appear in an area undergoing succession are known as the pioneer species. These organisms lead to a more biodiverse steady-state ecosystem.
        
             
        
        
        
It is D & E. Uranus is Helium & Hydrogen, And it has dark rings