D beacuse i know that from past experiance
        
                    
             
        
        
        
 Explanation:
definition of "Mental Health"- a person’s condition with regard to their psychological and emotional well-being.
how it effects- affects how we think, feel, and act. It also determines how we handle stress, relate to others, and make healthy choices. Mental health is important at every stage of life, from childhood and adolescence through adulthood.
 
        
                    
             
        
        
        
Explanation:
one of the things that you can do can be drinking soemething(like a healthy protein smoothie) with protein powder but also doing like weights or pushups,etc
 
        
             
        
        
        
Maybe it could be that their brains aren't fully developed and they are going through a lot of different hormones which makes things more intense emotionally.