The answer is B.
These elements are among the most important elements in life. Most of these elements are also non-metals. Elements life sulfur and nitrogen combine with carbohydrates to form among acids rings like cysteine. Carbohydrates combine with phosphorus to form molecules such as the DNA backbone chain. 
 
        
             
        
        
        
Answer:
D. Oral cavity to the trachea to the larynx to the right and left main bronchi.
Explanation:
 
        
             
        
        
        
Considering the choices; 
A. blood glucose level and pH
B. amount of light and temperature
C. amount of light and pressure
D.
temperature and pH
Answer;
D.
temperature and pH
The two factors affect an enzyme's operation the most is the temperature and pH.
Explanation; 
Enzymes work best at optimum pH and temperature. 
At low temperature for example the enzymes are inactivated while at high temperatures enzymes are denatured. 
At optimal temperature and pH; the chemical reaction rate is optimal.
 
        
                    
             
        
        
        
<span>The Mediterranean dry-summer
climates usually experiences dry temperatures during summer because of the
subtropical high overhead. Mediterranean climate is also a mesothermal climate;
it means that it normally has a long, dry, and hot summer. It is usually
associated with dry summers, and in contrast, mild, rainy winters.</span>