Final answer:
When an audience member asks an unfriendly question, it is best to acknowledge the question and address the concern politely.
Step-by-step explanation:
When an audience member asks a question that you perceive as unfriendly, it is best to begin your answer by politely acknowledging the question and addressing the concern. By doing so, you demonstrate that you have considered opposing views and can present your position as preferable. It is important to remain respectful and avoid responding defensively or making a joke to diffuse tension.