If a sender writes a very clear message but sends it to the wrong person, which aspect of communication is most affected?

Correct answer: Correct identification of the receiver

Communication is effective only when a clear message reaches its intended receiver. Here the wording is clear, but the receiver has been identified incorrectly, so the message cannot fulfil its purpose. The channel may be email or another medium, yet the central defect is addressing the message to the wrong person, not its length or feedback speed.