Gossip and rumor in an organization are part of the Grapevine, a type of Informal communication channel.
This is because a Grapevine is a form of an informal communication channel in a business organization. In this way, the information can be diffused from any level, either from bottom to top or top to bottom.
The information passed is usually in the form of gossip and rumor. It does not have official backing or formal approaches such as through emails of the business firm or signed and stamped letters.
Hence, in this case, it is concluded that the correct answer is Grapevine; and informal.
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