I think that it's with a viral infection.
 
        
             
        
        
        
Answer:
4
Explanation:
The way he acts is very childish but at the same time realizes whats going on 
 
        
             
        
        
        
Answer:
Correlation virus causation.
Explanation:
The uncertainty of the direction by which these relationships exist indicate the importance of remembering the principle of correlation virus causation.
 
        
             
        
        
        
The answer is A. That is the most reasonable answer and I’m so sorry if it’s wrong. Hope that helps. Feel free to ask me more questions!!
:)
 
        
                    
             
        
        
        
Hello,
The answer is option B "decreases".
Reason:
The answer is option B because fitness walking relieves stress on the joints so the answer is option B.
If you need anymore help feel free to ask me!
Hope this helps!
~Nonportrit