The law of limiting factors for photoshythesis was enunciated by

Answer: Option D

The law of limiting factors for photosynthesis was enunciated by Blackman.
In 1905 Frederick Blackman articulated the role of limiting factors as follows: "When a process is conditioned as to its rapidity by several separate factors the rate of the process is limited by the pace of the slowest factor."
The identification of a factor as limiting is possible only in distinction to one or more other factors that are non-limiting.