Which of these is an example of a positive influence on avoiding tobacco
abuse?

there's all sorts of positive influences. Less tar in the lungs, lower blood pressure, no social stigmas which result in a more positive social experience. Not to mention more money as tobacco products are expensive.

when you rub, you also apply pressure, that pressure can urge the poop to come out. i think that when your rubbing, you also might be slightly breaking it up and that can further fill the stomach.  

lifetime activities are certain actions that are either required throughout your life or you choose to do them. for example, eating is considered a lifetime activity, drinking water or other beverages, keeping your body clean, taking medicine. those types of actions are considered lifetime activities.