Which of the following is a common symptom of anxiety disorders?

Excessive worry is a hallmark symptom of anxiety disorders. Individuals experiencing anxiety often find themselves preoccupied with various concerns about the future, health, relationships, and other life situations, which can become overwhelming. This chronic worrying can affect their daily functioning, leading to physical symptoms and emotional distress.

In contrast, the other options typically do not represent symptoms associated with anxiety disorders. Increased appetite may be linked to other conditions or stress responses rather than anxiety. Heightened energy levels could suggest conditions like mania or excitement but are not representative of anxiety disorders. Reduced interest in daily activities is more indicative of depressive disorders than of anxiety, as individuals with anxiety often remain engaged but struggle with concerns that hinder their participation. Thus, excessive worry stands out as a defining trait of anxiety disorders.