Which of the following is a common barrier to effective communication in public speaking?

Language differences and emotional interference are indeed significant barriers to effective communication in public speaking. Language differences can lead to misunderstandings, as speakers and listeners may interpret words differently based on their backgrounds or experiences. This can create confusion and prevent the intended message from being conveyed clearly.

Emotional interference adds another layer to this barrier. When audience members have strong emotions—such as anger, fear, or sadness—they may find it difficult to listen objectively or absorb the speaker’s points. Their emotional state can cloud their understanding and reaction, making it challenging for the speaker to connect with them effectively.

While the other options present valid concerns—such as a lack of enthusiasm affecting engagement, excessive reliance on visual aids detracting from the message, or audience agreeability leading to complacency—none encapsulate the multifaceted nature of communication barriers as well as language differences and emotional interference do. These latter factors can fundamentally disrupt the interaction's clarity and effectiveness, ultimately hindering the public speaking experience.