Answer:
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Explanation:
 
        
             
        
        
        
The best and most accurate technique to identify the appropriate vein site for iv catheter insertion into the arm is to apply a tourniquet approximately 4 to 6 inches above in the arm where the catheter is to be inserted. 
Applying the tourniquet causes the vein to swell from inside due to the pressure which makes the intended insertion point much more clear and visible and helps the nurse to determine if the vein is capable of accommodating the iv catheter.
 
        
                    
             
        
        
        
Believe it or not, 99.9% of the species on Earth have gone extinct. Now, not all of these were caused by Humans, some were caused by MAJOR cataclysmic events such as the extinction of dinosaurs or other prehistoric animals that make up a large amount of the species on Earth. And remember that all the prehistoric plants are also included, because every plant organism is ALSO a species. 
Hope this helps, if not, comment below please!!!
 
        
             
        
        
        
Hi!
It would be D, because trilobites were aquatic.
Hope this helps!