Final answer:
The phrases provided are observations of body language, which help infer a person's feelings or thoughts through nonverbal cues.
Step-by-step explanation:
The phrases “You appear tense,” “I notice you're biting your lips,” and “You appear nervous whenever John enters the room” are examples of body language observations. These observations are made to infer feelings or thoughts based on nonverbal cues. Body language is a crucial aspect of communication, and it can provide insights into a person’s emotional state, such as stress or anxiety, without them having to voice it explicitly.
When describing such scenarios, especially in a narrative, showing through descriptive body language can enhance the engagement of the reader and offer a deeper understanding of the character’s emotions, just as in the provided examples of test-taking nervousness and the accompanying physical manifestations of that stress.