After having a very large meal at her mother's house, Stefani complains that she is "too full to move.". Soon after, Stefani's aunt arrives with a strawberry pie, which is Stefani's favorite; and Stefani eats three large pieces of the pie. Stefani's eating of the pie after having a large meal is best explained by the.

a. "pull" of external stimuli.
b. "push" of internal needs.
c. process of homeostasis.
d. drive reduction of stimulus motives.

 a) "pull" of external stimuli.

Explanation:

Pull of external stimuli is indicated through making stimuli that makes a goal more attractive .This motivates a person towards something through external factors or element

According to the question, pull of external stimuli is seen as pie is acting as the external stimuli which was earlier not a goal but due to the attraction it had Stefani's focus on it , it made her eat pie even after large meal.

Other options are incorrect because push of external stimuli, homeostasis process and decrease in motive of stimulus is not the cause of Stefani having large pie after huge meal.Thus, the correct option is option(a).

the branch of biology that deals with the normal functions of living organisms and their parts.

the way in which a living organism or bodily part functions.