The correct answer states that the loss of non-verbal information makes it difficult to share emotions and nuances, causing relationships to tend towards superficiality. This is the core argument of the passage, particularly in the second and third paragraphs, which discuss how the stripping away of non-verbal cues leads to a 'thinning of context' and can 'transform human relationships themselves into something superficial.' Option 1 is a symptom, not the root cause. Option 2 is an overstatement; the author does not claim a complete loss of ability. Option 3 focuses on speed, whereas the author's main concern is the lack of depth and non-verbal information.