Which is a sign of physical stress?

• A. Motivation
• B. Optimism
• C. High energy
• D. Insomnia

Answer: (D)

Physical stress ramps up the body’s arousal systems, releasing stress hormones that keep you alert and on edge. That heightened arousal often disrupts sleep, so people wake up frequently, have trouble falling asleep, or can’t stay asleep—this is insomnia. Sleep is when the body recovers, so when stress interferes with rest, insomnia becomes a clear signal that the body is under stress. Other options describe mood or energy levels rather than a direct sleep disruption, which is why they don’t fit as the best sign of physical stress.