Which of the following is NOT a medium used in communication?

Interpersonal skills refer to the abilities and techniques used by an individual to communicate and interact effectively with others. While these skills are crucial for facilitating communication, they are not considered a medium through which communication occurs. Instead, interpersonal skills enhance the effectiveness of methods and mediums used in the communication process.

In contrast, face-to-face interaction, written reports, and digital platforms are all tangible mediums that enable communication to take place. Face-to-face interaction involves direct verbal and non-verbal exchanges between individuals, written reports convey information in a documented format, and digital platforms encompass a variety of online channels, such as emails, social media, and messaging apps. Each of these options represents a specific method or channel through which messages can be transmitted, making them clear mediums of communication.