Answer:
Option A
Explanation:
There are total 16 countries in the Middle East region
Bahrain, Cyprus, Egypt, Iraq, Israel, Jordan, Kuwait, Lebanon, Oman, Palestine, Qatar, Saudi Arabia,  Arab Republic, Turkey, the United Arab Emirates and Yemen
Two regions 
western Asia and north-eastern Africa
 
        
             
        
        
        
Answer:
It has greatly increased but leveled off in recent years 
Explanation:
 
        
                    
             
        
        
        
The answer to your question is
 508