किसी भी प्रभावी संचार प्रणाली में प्रतिपुष्टि (फीडबैक) का प्रयोग मुख्य रूप से किसलिए किया जाता है?

When a teacher illustrates a concept to students in a classroom, the illustration can be considered as which component of communication?

Which of the following situations serves as an example of oral communication?