What is a psychological symptom caused by stress?

Anxiety and frustration are classic psychological symptoms that commonly arise in response to stress. When individuals experience stress, it can trigger a variety of emotional and psychological reactions, such as feeling overwhelmed, anxious, or frustrated. These responses are part of the body's natural reaction to perceived threats or challenges, which can manifest as a heightened state of alertness, worry about future events, or difficulty managing emotions.

The other choices do not align with the effects of stress. Increased physical fitness is typically a result of regular exercise and a healthy lifestyle, rather than a direct symptom of stress. Enhanced mood stability suggests a balanced emotional state, while stress is more likely to disrupt this stability. A sense of deep relaxation is contrary to the experience of stress, as stress usually leads to heightened tension and arousal rather than relaxation. Given the context of how stress affects individuals psychologically, anxiety and frustration emerge as direct and common responses.