After a day of walking and shopping, a couple is hungry and sets out to find a place to eat. According to the theory, the couple will meet their needs once they find food. drive-reduction expectancy-value stimulus arousal

The Drive Theory

Explanation:

The drive theory, or drive doctrine is referred to as the theory that tries  to determine, classify, or analyze the psychological drives. A drive is a need that is  instinctual  that has the power of motivating  the behaviour of an individual, such state is called   an "excitatory state” developed by a disturbance that are homeostatic.

The principle of the theory of drives is based on organisms with a certain psychological needs and when these needs are not meet a negative state of tension state is created.

Humans, Animals and Organisms are born with certain subconscious needs, such as the need to provide for family, the need to feed as described by the Drive theory. a state of tension that is seen as negative is created when these needs are not satisfied. When such need is satisfied, drive level is reduced which helps achieve a relaxed state and balance state

The question stated, best describes the couple hunger and with a need to satisfy that drive  

the answer to your question is,

old stone age.

-mabel < 3

answer; the natural law school;