D. Pathogen. :) I hope it right :)
Answer: One factor is having the child raised around or in a negative environment.
Another factor is not uplifting the child. Disrespecting and/or belittling the child can cause low self-esteem which could tag along for the rest of the kid's life .
I believe teens definitely are most concerned about muscular strength. They are more worried about that because they want to protect themselves, impress others, sometimes kids just want to bulk up to not look so wimpy, etc.
I would have to say teens are less worried about flexibility because when you have mussels why worry about doing the splits or putting your leg up to your head. One thing will always distract you from the rest.
because its nice and shiny because your eye changes in light pepoils and brain comes in because through your eye is your brain