Concept:Transpiration is affected by environmental and structural factors like humidity, temperature, and stomatal size, not the weight of stomata pores.
Explanation:-The rate of transpiration depends on humidity, temperature, air movement, light, and water availability.
-The size of the stomata pores affects the opening through which water vapor escapes.
-Humidity affects the diffusion gradient of water vapor.
-Temperature affects evaporation rate.
-The weight of stomata pores has no direct effect on transpiration rate.
Answer:A. the weight of the stomata pores