Final answer:
To target different teenagers in an exercise campaign, the advertising director could focus on aspects such as hobbies, interests, and social activities. Slogans that are relatable and highlight the benefits of exercise would be effective.
Step-by-step explanation:
In order to target different teenagers in a campaign to encourage exercise, the advertising director could focus on aspects of their lifestyles such as their hobbies, interests, and social activities. For example, if a teenager enjoys playing basketball, the campaign could feature slogans like 'Get in the game, stay fit!' or 'Dribble, shoot, repeat for a healthier you!'. These slogans would be effective because they are relatable to teenagers and highlight the benefits of exercise.