Which barrier occurs when the technology used to communicate fails to function properly?

The correct answer highlights a specific type of barrier that arises from issues related to the tools and technology utilized in communication. Physical barriers encompass problems that occur when the equipment or technology responsible for transmitting messages is inadequate or malfunctions. This could involve anything from internet connectivity issues, malfunctioning projectors, to problems with audio-visual aids during a presentation. Such technical failures can disrupt the flow of communication, making it difficult for participants to exchange information effectively.

The other options refer to different types of barriers. Process barriers pertain to the inefficient procedures in communication, personal barriers are related to individual attitudes or perceptions that hinder understanding, and semantic barriers arise from misunderstandings due to language differences or jargon. While these are all important considerations in communication, they do not specifically address the failure of technology, which is precisely what physical barriers encompass.