Answer:
Option C, will be the rate of photosynthesis
Step-by-step explanation:
A dependent variable is one whose effect or existence is affected by any kind of change in the independent variable. An independent variable is not affected by any other factor with in an experiment.
Here in this case , the wavelength of light is an independent factor as it is being modulated during the experiment to study its impact on rate of photosynthesis. The variable “rate of photosynthesis” is affected by the variation in independent variable “wavelength of light”, hence “rate of photosynthesis” is a dependent variable .