Answer:
Internal can be you don't want bad things happening to your body, you don't want drugs affecting your health,etc.External could be you don't want it to affect your family or people around you.For example, like a cigarette if you are smoking in public you can be affecting others passing by or hanging out with you(external)but if it's just you by yourself smoking it is damaging your lungs(internal)
The answer is C) GPS fitness monitors
GPS monitors track your location over time, which is a better way of measuring distance traveled than a device that measures the number of footsteps you've taken.
What's the question here? I am slightly very confused
Their brittle bones and blood clots
Just do types of foods with high vitamin or things like that
