The link between the two is that they both can cause headaches and sores from the body. Since anxiety affects the body mentally it can also affect it physically too.
        
             
        
        
        
Lifting weights is safe for kids, provided they are mature enough to follow instructions and use proper technique
hope it helped
        
             
        
        
        
Answer: A.
increase the size of the muscle cells and the amount of blood that is delivered to the muscle
Explanation:
Increasing the size of the muscle cells and the amount of blood that is delivered to the muscle is important when it comes to muscular endurance. 
The greater muscular endurance is the higher number of exercises that are including muscle effort against a force for a particular period of time. 
High muscle endurance is helpful to the human body and immunity.
 
        
                    
             
        
        
        
I think the answer would be no
        
             
        
        
        
The blood ph level is not maintained by the respiratory system.