Which scenario best illustrates the concept of drive reduction?

The scenario best illustrates the concept of drive reduction is: The sun is bothering Mary's eyes, so she moves into the shade of a nearby tree.

Drive reduction refers to a motivation to do a specific activity because of some changes in a person's homeostasis environment.

In this case, the normal condition for mary is when her vision is not disturbed by any form of object or substance, so she act in order to eliminate that disturbance