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

Sweating is a common physical symptom of anxiety due to the body's natural response to stress. When a person experiences anxiety, the body's "fight or flight" response is triggered, leading to the release of stress hormones like adrenaline. These hormones prepare the body for potential danger, causing various physiological changes, including an increase in sweat production to help regulate body temperature. This response can manifest as excessive sweating, especially in situations where the individual feels threatened or uneasy.

Other symptoms, while they may occur in individuals with anxiety, are not as directly tied to the physiological response triggered by anxiety as sweating is. For instance, fatigue can be a result of prolonged anxiety but is not a direct physiological symptom. Similarly, headaches and memory loss can be associated with anxiety but are often secondary effects rather than primary symptoms.