Final answer:
The question about sauce placement in relation to 'the PB thing' lacks context and clarity, making it impossible to provide a definitive answer or categorize it under a specific academic subject or grade level.
Step-by-step explanation:
The question 'Where should the sauce be when running the PB thing?' is ambiguous without additional context. It seems to be referring to a practical scenario, potentially related to food preparation or culinary arts, rather than an academic subject. Without further clarification, it's not possible to determine whether the 'PB thing' refers to an appliance, a culinary technique, or something else entirely. Therefore, we are unable to define which subject or grade level this question pertains to.
Generally, the application of sauce in a culinary context depends on the dish being prepared and the intended presentation. Sauce can be drizzled on top, poured on the side, spread all over, or omitted according to the recipe and presentation style. Unfortunately, we cannot provide a definitive answer to this question without more information.