I'm not positive but I think it's water because more substances dissolve in water than any other substance so, you can at least try it!!!
 
        
             
        
        
        
The answer is D. learned behavior.
A change in behavior of an organism takes place due an experience is called learning. Animals learn behavior in many ways. On such way is given the question that anole lizard ate bright red butterfly instead small insects which are its normal food and became ill. Anole lizard learned through experience that bright red insects are not its food. Thus, a learned behavior is one that an organism develops by encountering experience.    
 
        
                    
             
        
        
        
If the inner lining of the air sacs neither thin nor highly vascularized, then it can be inferred that AIR SACS ARE CANNOT BE THE SITES OF GASEOUS EXCHANGE BETWEEN AIR AND BLOOD. Air sacs are generally lined with mucus and surrounded with blood capillaries. 
In case of birds, air sacs play an important role in respiratory system. 
        
             
        
        
        
D, they need to be able to absorb and keep water to prevent drying out
        
                    
             
        
        
        
Answer:
If your blood pH levels aren't regulated then your blood will be like acid and potentially be fatal.
Explanation:
Your body tries to maintain homeostasis so regulating blood pH levels is vital.