Back pain because bone heart and lung have nothing to do with muscles
Intervention is a health promotion activity designed to change a pre-existing condition related to the target audience's behaviour. Interventions include a screening programs, vaccination, food supplementation and water supplementation, and health promotion.
Health promotion is a kind of process of allowing people to increase command over and improve their health. It enables to move beyond a focus on individual behaviour toward a wide range of sociable or environmental interventions.
Health promotion activities are typical activities for fitness promotion, wellness programs and disease prevention which include Advertising Health Care for Grown-ups, Helping People Who Smoke Quit, Increasing Access to Healthy Foods and Physical Activity, Preventing Excessive Alcohol Use, or Promoting Women's Reproductive Health, etc.
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Answer: Reciprocity
Explanation:
Because of his help, which is not a small one since he has carried heavy things upstairs, he is hoping that reciprocity will make you willing to help him too.
This is referring to an obligation in returning the favor because he was doing that favor to you at first.
Then, both of you will have done a benefit that is good for both and this is considering a good action. He knows that you should be willing to do that more than anyone else because he has done favor to you.
