Describe the physiological processes occurring in the muscle cells that account for the gradual onset of muscle fatigue.

Anaerobic is the physiological process occurrence where muscle cells which amount to the gradual onset of muscle fatigue.
Fatigue muscle is the intense or repeated use of muscle which leads to the performance decline. Muscle fatigue mechanism appears in the involvement of calcium leakage. The physiological factors like maximum rate of oxygen uptake determine maximum intensity exercise.

Your answer is going to be b.