As exercise levels increase, which of the following physiological changes occurs in the respiratory system? A. The respiratory muscles shrink. B. The lungs expand in size. C. The trachea widens. D. The airways narrow. Please select the best answer from the choices provided. A B C D.

Use the list of barriers and media messages you identified to select three possible educational campaigns you could develop in order to members of your community avoid or overcome those barriers. possible campaigns might focus on avoidance of underage drinking or teen substance abuse, prevention of driving under the influence, teen driving safety, validating or refuting perceptions of norms regarding drug use, or promoting a drug or teen court advocacy program in your community make sure your campaign uses technological resources, such as graphic design, word processing, or web page design software.