Who proposed the 'law of limiting factor' as the 'law of minimum'?

What is the relationship between habitat and temperature in the context of photosynthesis?

$DCMU$ is a herbicide which kills the plant by

In nature,the rate of photosynthesis is primarily limited by which of the following factors?

The law of limiting factors for photosynthesis was enunciated by

Identify the incorrect sentences:
$(I)$ Humidity in the atmosphere is relatively higher in areas where light becomes a limiting factor for plants.
$(II)$ An increase in light intensity beyond a certain point causes the breakdown of chlorophyll,leading to a decrease in the rate of photosynthesis.
$(III)$ $C_4$ plants respond to higher temperatures and show higher rates of photosynthesis,while $C_3$ plants have a much lower temperature optimum.