Natural selection means that the organisms better adapted to their environment, that is, they have developed the right characteristics/skills/response to the external ambient, have higher chance to survive, making the next generations genetically inherit such acquired surviving characteristics.
These generations will thus have a higher chance of survival, making these species being "naturally selected" as survivors, while those who haven't or are slower in this process, have a higher risk of elimination. 
        
             
        
        
        
The LEFT VENTRICLE of the heart supplies oxygenated blood to the aorta.
Aorta is the main artery that supplies oxygenated blood from the heart to other organs and tissues (except lungs, lungs are for gas exchange instead) so that they get enough oxygen and nutrients.
Meanwhile, the heart has 4 chambers, left and right atrium, and left and right ventricles. Atrium are for receiving blood from different vessels, and ventricles are for pumping blood out of the heart.
Since only the left ventricle is connected to the aorta, so, the answer should be left ventricle.
Reference picture by amac training.
 
        
        
        
Answer:
A strain is most likely the cause of pain while stretching your right arm, which occurs from lifting an object inappropriately, overuse of the muscles and tendons, or excessive pulling on the muscles. (:
Explanation:
 
        
                    
             
        
        
        
It’s c hope this helps you
        
             
        
        
        
Wires made of conductors have low resistance