Which of the following facial expressions indicate disgust?

The expression that primarily signifies disgust is characterized by specific facial movements. The nose wrinkling is a key indicator of disgust, as it often occurs in response to something perceived as offensive or unpleasant. This facial feature is often accompanied by a raised upper lip, which further emphasizes the sense of revulsion.

While the upper lip raising indeed correlates with disgust, the option specifying solely the nose wrinkling highlights a distinct aspect of that particular emotion. The display of the tongue, although related to various emotional expressions, is less commonly linked to disgust specifically.

In summary, the correct choice highlights one of the defining features of disgust, helping to recognize and understand this emotion in various contexts. The inclusion of other facial movements as part of the broader spectrum of disgust expressions can add complexity, but they do not detract from the primary indicator focused on here.