The correct answer to this open question is the following.
After closely examining the public service advertisement, we can explain the elements of the advertisement that convey the viewpoint effectively.
In the advertisement, we can see a photo of three children running in the park. At the top of the poster, there is the legend "Physical Activity= Better Academic Performance."
Then there is a text that says "Studies show that physical activity can enhance important skills like concentration and problem solving, which can improve academic performance. Talk about a competitive edge."
And this is so true and makes the advertisement credible. When children combine their academic activities with physical activity, they develop new capacities. Exercise helps children to have good health, promotes discipline, develop their focus, and make them competitive. Those attributes can help them in school and prepare them for life.