<span>If they can learn more about how the human body ages, why it ages the way it does, why some people are able to live far longer than others, then perhaps we could apply these different facts in order to eventually prolong our lifespan.</span>
From your nerves system and nerves
The answer is true.
Examples: washing your hands prevents the spread of disease.
Hope this helps =)
One positive example of health fitness advertisements would be advertisements that get you to come to the gym to work out.
A negative example would be dieting pills that make it seem like you don't have to put in any work to lose weight healthily.