Rate of photosynthesis does not depend upon:

Explanation

The correct answer is Duration of Light. The rate of photosynthesis is primarily affected by the quality and intensity of light, as they directly influence the efficiency of the light-dependent reactions. Duration of light affects the total photosynthetic output over time but not the immediate rate once a certain threshold is achieved. The other factors, such as the quality of light, intensity of light, and temperature, have direct and immediate effects on the photosynthetic rate. Quality and intensity determine the energy available for photosynthesis, while temperature influences enzyme activity essential for the reactions involved.