Informal communication mainly consists of which of the following?

Informal communication encompasses more casual and spontaneous methods of exchanging information, often characterized by its unstructured nature and the familiarity between the communicators. Internal memos and text messages fit this definition because they are typically less formal than official communications and can be exchanged quickly and casually among team members or colleagues. This type of communication fosters a collaborative environment, enabling more open and relaxed dialogue.

In contrast, reports and presentations, official memos, and formal letters are structured forms of communication that follow specific formats and protocols, typically used for formal interactions within an organization. These forms are designed to convey information clearly and professionally, often for record-keeping or formal announcements, which does not align with the essence of informal communication.