C. Vegetation 
because even though cows are important, all life is and not just that species and then cars and factories are unnatural and would not be critical for the carbon cycle in nature.
        
             
        
        
        
QUESTION NUMBER ONE IS A AND FOR QUESTION NUMBER TWO IT IS  B
        
             
        
        
        
I'm not sure but it might be C
        
             
        
        
        
To relieve airway obstruction in infants, lay the baby face down along your forearm using your laps for support. Apply five quick, forceful blows at the baby's back with the palm of  your hand.
If the object did not come out, turn the baby face up and give five quick down thrusts. Continue the back slaps and the chest thrust cycle until the baby recovers.
        
             
        
        
        
I think it’s leaf okkkkkkkkkkkkkkkkkkkkkk