Final answer:
The most effective piece of evidence to support the claim that adolescents who exercise daily are healthier than those who are inactive is the 2018 Physical Activity Guidelines for Americans.
Step-by-step explanation:
The most effective piece of evidence to support the claim that adolescents who exercise daily are healthier than those who are inactive is the 2018 Physical Activity Guidelines for Americans. These guidelines provide evidence-based recommendations for appropriate physical activity levels and highlight the numerous health benefits of increased physical activity. The guidelines state that for substantial health benefits, adults should do at least 150 minutes per week of moderate-intensity aerobic activity or 75 minutes to 150 minutes per week of vigorous-intensity aerobic activity, or an equivalent combination of both. This evidence suggests that regular exercise is essential for maintaining good health and reducing the risk of chronic diseases.