Step 1: Concept Definition:
Mass communication involves the creation, transmission, reception, and analysis of messages disseminated to extensive audiences through spoken and written channels. Its defining feature is the capacity to simultaneously connect with a vast, anonymous, and diverse population. Communication that is private and directed towards an individual or a limited group is termed interpersonal communication.
Step 2: Option Analysis:
Examination of the provided options:
1. Cinema: Films are exhibited to large gatherings in movie theaters, establishing cinema as a medium of mass communication.
2. Radio: Radio transmissions cover broad geographical areas, reaching countless listeners concurrently. This is a quintessential instance of mass communication.
3. Letters: Letters are a written communication method typically intended for a specific recipient or a small number of known individuals. This constitutes interpersonal communication, not mass communication.
4. Newspapers: Newspapers are produced in high volumes and circulated widely, distributing information to the general public. This is a foundational form of mass communication.
Step 3: Conclusion:
Letters represent a mode of personal communication and are not classified as mass communication.