I cannot answer this without the question, so sorry. What is he using? Why? I need more details
Had to look for the options and here is my answer.
William Shakespeare is a well known writer of various plays. And for him, he wanted these to be conveyed realistically in order to become more convincing to his audience. And the phrase that suggests this purpose is "the mirror up to nature". This phrase means that his play is like a reflection of reality.
Answer:. The public service campaigns are designed in order to persuade the consumers to bring certain change in their behavior. These behaviors result in promoting healthy behaviors or good citizenship.