Which of the following is NOT a key to good communication?

Good communication relies on several essential elements, and while politeness is certainly important in fostering a positive interaction, it is not considered a foundational key in the same way as the other options. Being honest in remarks builds trust and ensures that the information conveyed is accurate and straightforward. Excellent listening skills facilitate understanding and allow the communicator to respond appropriately to the concerns or questions of others. Understanding nonverbal cues is crucial because much of communication occurs through body language and facial expressions, which can provide context and additional meaning beyond spoken words.

In comparison, politeness can enhance the interaction but does not directly contribute to the effectiveness of the communication itself in conveying clear ideas, ensuring understanding, or building trust. Therefore, while it enhances interpersonal relations, it does not stand as a core component of effective communication.