Answer:
The main pointer to choking would be the child's skin. 
Explanation:
 The child's skin looks blue due to the blood. Blood that is rich in oxygen looks red, while blood with little to no amounts of oxygen appears dark blue. The dark blue, poorly oxygenated blood is showing through the skin, warning the person that the infant is choking.
 
        
                    
             
        
        
        
Answer:
Neurons
Explanation:
Neurons are nerve cells that carry "messages", or electrical impulses btw the brain and other body parts. Very important to the Nervous System!
 
        
             
        
        
        
I would say the most popular sales are fruit and marketing would be super market
        
             
        
        
        
Answer:
I would assume 204bpm because you'd double the 50% bpm to make the maximum bpm.
Explanation:
Only use this answer as a last resort, it's  been awhile since I worked on heartbeat and pulse topics. I was also not very good at it in the first place.