Answer:
francium
Explanation:
The most expensive natural element is francium, but it decays so quickly it can't be collected to be sold. 
 
        
             
        
        
        
Answer: Decrease
It will decrees because required volume of blood will not be   emptied into the pulmonary circulation  to reach the lung for oxygenation. Rather blood flows back into the  Right  atrium ,(regurgitation,) through the these valves   during ventricular contraction ( systole)of the Right Ventricle instead to the pulmonary circulation which  reduces blood flow leading  to volume overload  in  the heart. Eventually this  affects systemic circulation,
Explanation:
 
        
             
        
        
        
Maybe B. the government because maybe he was the important one.
 
        
                    
             
        
        
        
C...? what's the question
        
             
        
        
        
The answer your looking for should be flowering plants