Hello
what do you mean by Transpiration ?

transpiration, in botany, a plant's loss of water, mainly through the stomates of leaves. ... He found that transpiration occurred from the leaves and that this process encouraged a continuous upward flow of water and dissolved nutrients from the roots.

Transpiration is the process of water movement through a plant and it's evaporation from aerial parts, such as leaves, stem flowers.

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms