Which of the following is a sign of physical stress?

• A. Lack of work ethic
• B. Low morale
• C. Difficulty concentrating and remaining focused
• D. Insomnia

Answer: (D)

Insomnia is a direct sign of physical stress because stress triggers the body's fight-or-flight response, releasing hormones that keep you alert and disrupt normal sleep. When the body is under strain, falling asleep or staying asleep becomes difficult, leading to sleep deprivation. That lack of rest then affects daytime performance, making fatigue, slower reaction times, and impaired judgment more likely.

Lack of work ethic and low morale are more about motivation or attitude, not a direct bodily signal. Difficulty concentrating can occur with stress, but it’s a cognitive symptom rather than a clear physical change like disrupted sleep.