Final answer:
Arousal theory suggests that people are sometimes motivated to increase rather than decrease their level of stimulation.
Step-by-step explanation:
The arousal theory of motivation differs from the drive-reduction theory in that arousal theory suggests that people are sometimes motivated to increase rather than decrease their level of stimulation. Drive-reduction theory, on the other hand, emphasizes the idea that deviations from homeostasis create physiological needs that result in psychological drive states that direct behavior to meet the need and ultimately bring the system back to homeostasis.