Final answer:
John believes that promotion creates needs among consumers by influencing their behavior and convincing them that they need new products to be happy.
Step-by-step explanation:
Based on the scenario presented, John is highly critical of promotion and the persuasive power of advertising. He is concerned that promotions create artificial needs among consumers. Specifically, John believes that promotion creates needs. He sees these needs as driven by marketing techniques that influence consumer behavior, causing them to want things they did not previously desire or require, potentially leading to a consumer culture where happiness is equated with material possessions.