Your body's response to physical demands and strain.

• A. Impulsivity
• B. Antiauthority
• C. Physical Stress
• D. Headwork

Answer: (C)

The body's response to physical demands and strain is physical stress. This describes how your body automatically reacts when you push it—heart rate rises, breathing speeds up, muscles tire, energy stores are mobilized, and fluids can be lost through sweat. These responses help you meet the task at hand in drone operations, but they also signal when you’re approaching your limits, guiding you to pace yourself, hydrate, rest, and manage fatigue. The other ideas describe mental traits or behaviors rather than the body's physical reaction: impulsivity is acting without forethought, antiauthority is a defiant attitude, and headwork refers to thinking or planning. So physical stress best fits the description.