Which one of the following choices represents nonverbal communication?

Nonverbal communication encompasses the ways in which we convey messages without using words. This includes body language, facial expressions, gestures, posture, and other forms of nonverbal cues that can significantly influence how messages are received and interpreted.

In this case, crossing your arms while the patient speaks is a clear example of nonverbal communication. This gesture can indicate various states such as defensiveness, discomfort, or disengagement, potentially affecting the interaction between the healthcare provider and the patient. It serves as a nonverbal signal that can impact the perception of the speaker's openness and willingness to engage.

The other options primarily involve verbal communication elements, such as tone of voice and the use of medical jargon. The raised or lowered tone of voice can influence the meaning of verbal communication but remains a verbal aspect rather than strictly nonverbal. Speaking in medical terms also pertains to the use of language and terminology, which is inherently verbal. Therefore, the only choice that distinctly falls under the category of nonverbal communication is the act of crossing your arms.