Which is considered a physical sign of stress?

Insomnia is considered a physical sign of stress because it directly affects the body's ability to rest and recover. When an individual experiences stress, whether from work, personal situations, or other factors, it can lead to disruptions in sleep patterns. Insomnia may manifest as difficulty falling asleep, staying asleep, or waking up too early and not being able to return to sleep. This lack of restorative sleep can have significant physical effects, including fatigue, headaches, and weakened immune function, which are all physical manifestations of stress.

In contrast, the other options reflect emotional or behavioral responses rather than strictly physical signs. While lack of work ethic, difficulty concentrating, and low morale can all be associated with stress, they are more aligned with changes in motivation, cognitive function, and emotional wellbeing rather than a direct physical symptom. These responses may result from ongoing stress but do not provide the same direct physiological impact that insomnia does.