Answer:
Commensalism
Explanation:
Commensalism is when one organism benefits and the other doesn't benefit and is also not harmed. The tree is helping the orchid and the orchid isn't benefiting or harming the tree.
 
        
             
        
        
        
Usually blood transports nutrients
        
             
        
        
        
Ryfttydejdeexhfldyyldoydyofoyfx
        
                    
             
        
        
        
answer: 
photosynthesis converts energy into carbon dioxide and water into oxygen and glucose. glucose is used as food by the plant and oxygen is a by-product . cellular  respiration   energy into glucose into water and carbon dioxide 
water and  carbon dixode are by products and ATP is energy hat that is transformed from