Drive-reduction theory is why Lara is motivated to get an extra large drink.
One important behavioralist theory of learning is drive reduction theory. It asserts that organisms are driven to weaken their urges to preserve homeostasis. Any internal state that propels an organism to meet a need is referred to in this context as a drive. The fundamental tenet of drive-reduction theory is that all human behaviour is driven primarily by a desire to lessen one's "drives." A person's physiological or biological requirements, such as hunger, thirst, and a need for warmth, can cause an individual to experience a "drive," which is a state of arousal or discomfort. The idea is that when a person's drive first manifests, they will experience unpleasant tension, which prompts them to act in a way that releases that tension.
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