What type of barrier is present when an employee misses a meeting due to lack of confirmation email?

The best answer, in this case, is related to the medium or channel used for communication. A barrier related to the medium occurs when the method of communication fails, preventing the message from being delivered or received effectively. In this situation, the lack of a confirmation email serves as a hindrance, meaning that the communication channel (i.e., email) did not function as intended, leading to a missed meeting.

This type of barrier highlights the importance of reliable communication channels in ensuring that all parties are informed and able to participate. Effective communication relies on accurate and timely messages being sent through the chosen medium; when that medium fails, misunderstandings and missed opportunities can arise, as illustrated by the scenario of the employee missing the meeting.