Which of the following describes social anxiety disorder?

Social anxiety disorder is characterized by an intense and persistent fear of social situations where an individual may be scrutinized or judged by others. This anxiety isn't limited merely to fear but often includes an overwhelming concern about being embarrassed or humiliated in social contexts. People with this disorder may experience significant distress that interferes with their daily functioning, making it difficult for them to engage in everyday social interactions such as speaking in public, meeting new people, or even participating in conversations.

The other options describe different conditions or anxiety features. While an intense fear of crowded places refers more to specific phobias, an obsessive concern with physical appearance is more aligned with body dysmorphic disorder. A general feeling of unease can be indicative of generalized anxiety disorder, but it does not specifically address the social focus of social anxiety disorder. Therefore, the correct choice captures the essence of social anxiety disorder's focus on interaction and perceived judgment from others.