Stomatal movement is not affected by

Stomata are the tiny pores present in the green parts, predominantly in the leaves of the plants. We know that plants can breathe through the stomata. 

These pores can pass oxygen and carbon dioxide into the surrounding. The stomata are encircled by guard cells that are bean-shaped. 

The guard cells around the stomatal opening tend to increase the temperature and Environmental changes, which control the stomatal opening.

The end and opening of stomata are components of these guard cells. At the point when the guard cells expand, the stomatal pore opens, and when the guard cells shrink, the stomatal pore closes.

Hence, option A is the correct answer.