The answer should be the Hepatic portal vein.
Hope this helps.
        
             
        
        
        
I would choose Option 2
about 50% chance that the dominance is in, but when it is, its dominant, of course.
no other Option can give you a 50% chance
in 1 its always there, in 3 as well, in 4 never
 
        
                    
             
        
        
        
Answer:
When you exercise, the muscles you use require more energy. When exercise can be sustained, this demand is met primarily by aerobic means. Aerobic energy production in muscles results in increased gas exchange at the lungs, because more oxygen is taken in and more carbon dioxide is released.
Explanation:
 
        
                    
             
        
        
        
The weather and amount of resources
        
             
        
        
        
It is B I think 
Hope this helped