Weight control is the primary benefit of exercise.
This is false because exercise isn't just for weight loss but also for overall health, such as good heart function.
Fear, fear of lawsuit maybe, they don't know what to do
If they are in immediate danger (such as in middle of highway with cars coming)
Antibodies, antigens are the bad things antibodies fight :)
Things like running around the house will not be done as a kid, since as a kid you were way more energetic, but now as a young adult that may not be the case.