What is an advantage of using letters for communication?

Using letters for communication offers the advantage of maintaining a record of the message. This aspect is crucial in both personal and business contexts, as letters provide a tangible document that can be referred back to at any time. This characteristic is valuable for ensuring clarity and accuracy, allowing individuals or organizations to track agreements, commitments, and correspondence history.

Furthermore, having a written record can be essential in situations that require documentation for legal or formal accountability. It adds an element of professionalism and permanence to the communication process. In contrast, the other options do not highlight this key benefit, as some options incorrectly reference formats, informality, or immediacy that are not typically associated with the traditional use of letters.