Answer:
The best answer seems indeed to be number 1. The photo of the boy eating and the graphics of children playing baseball form a positive association between health and sports.
Step-by-step explanation:
The poster depicts a child eating while two other children play baseball. The images are very different from each other. The child who's having lunch is a black and white photo while the children playing baseball is a colored drawing. At first, they may not seem connected at all due to the differences. However, the poster is about the importance of having a good school lunch. Why, then, pictures of children eating and playing? Because it is common knowledge that children who eat well get the nutrients they need to be healthy. Healthy people lead a more active life, usually including sports. Sports themselves help people stay healthy. Therefore, the association of the two pictures aims to convince the audience that school lunch and health are strongly connected.