Which of these does NOT contribute to the effectiveness of a prompt?

Ignoring the audience significantly undermines the effectiveness of a prompt because understanding who the audience is plays a crucial role in how information is communicated and received. When a prompt neglects to consider the audience's background, interests, and expectations, it can result in a response that fails to engage or resonate.

In contrast, detailing the task provides clarity and ensures that the expectations and objectives are fully understood. Providing context enriches the prompt, allowing for a more nuanced understanding that guides the response more effectively. Structuring the response format helps shape the reply into a coherent and organized answer that meets the intended purpose. Each of these aspects—task detail, context, and structure—directly enhances the prompt's clarity and relevance, while ignoring the audience can lead to misunderstandings or irrelevance. Thus, B is the choice that does not contribute to the effectiveness of a prompt.