Final answer:
To demonstrate attentiveness while listening, one should maintain good body language and posture, which includes sitting upright, having a relaxed body position, and avoiding distracting body movements.
Step-by-step explanation:
When listening, it is crucial to maintain good body language, as it reflects attentiveness and engagement with the speaker. Body language, such as maintaining good posture and eye contact, conveys that you are actively listening and interested in what the speaker is saying. Good posture involves sitting upright on a comfortable chair with feet on the ground, and a relaxed body position, contributing to a positive and receptive listening environment. Additionally, monitoring your body positioning, such as not crossing arms or fidgeting, helps in not giving the impression of disinterest or discomfort.