Hello,
Here is your answer:
The proper answer to this question is option A "Repairing leaky faucets". That's because a water conversation technique is how you can preserve water without wasting to much. B, C, and D your using a lot of water.
Your answer is A.
If you need anymore help feel free to ask me!
Hope this helps!
        
             
        
        
        
The wings are adapted so they can hover and feed off of flowers. 
The beak and tong is modified to extract nectar from flowers with long flower corollas.
        
                    
             
        
        
        
Answer:
relating to or determined by the origin, development, or causal antecedents of something
Explanation:
 
        
                    
             
        
        
        
The correct answer is
<span>D. All the populations and the surrounding environment</span>
        
                    
             
        
        
        
Those are glucose, oxygen and carbon dioxide (CO2). 
<span>Respiration and photosynthesis are opposite processes in the plant cell. Photosynthesis makes the glucose and releases oxygen and they are used in cellular respiration to make ATP. The glucose is broken down during the respiration into CO2, which is used in photosynthesis. While H2O is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form H2O. </span>