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)
Answer:
Immerse burned area in cool water.
But it doesn't mean you should apply very cold water/ ice cold water on the burn. Extreme cold applied to a burn can further damage the tissue.
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