Any informal communication about company and personal matters outside the official network is called:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → Grapevine
Grapevine communication refers to informal communication that occurs outside the official channels within an organization. It includes casual conversations among employees about company matters or personal topics. Although unofficial, the grapevine spreads information quickly and often reflects the true feelings and opinions of employees.