Anaerobic respiration occurs in oxygen-limited, high-intensity efforts

Steps:

• Define anaerobic respiration as energy production in cells without oxygen, used when demand exceeds supply.
• Evaluate activities by intensity and duration: short, explosive efforts rely on it most.
• Compare oxygen needs: low-to-moderate activities use aerobic respiration with oxygen.
• Select the option matching high demand and limited oxygen time.

Why C is correct:

• Sprinting 100 meters demands rapid ATP via glycolysis without oxygen, as per anaerobic respiration definition for intense bursts exceeding aerobic capacity.

Why the others are wrong:

• A: Breathing supports oxygen delivery for aerobic respiration.
• B: Sleeping involves minimal energy use, fully aerobic.
• D: Walking maintains steady pace with ample oxygen for aerobic processes.

Final answer: C