The term 'Grape-vine communication' refers to:

Key characteristics:

Fast and informal transmission of information, often without verification.

Crosses formal hierarchical lines; not controlled or authorized by management.

Can be inaccurate or distorted, but also useful for quickly spreading information and sensing employee sentiment.

Why the other choices are incorrect: Formal communication: This uses official channels, documented messages, and prescribed procedures—unlike the informal grapevine.

Advertisement and publicity: These are deliberate, organized promotional activities, not spontaneous informal exchanges among employees.

Selective perception: This is a mental process of how people interpret messages, not a type of communication network.