The concept that an organism is motivated to act because its body is in a state of need is based on the __________ theory.

A) incentive
B) affiliation
C) drive
D) instinct

The drive theory suggests that behavior is driven by biological needs that arise from imbalances or deficits in the body, such as hunger or thirst. The organism is motivated to engage in certain behaviors in order to reduce these deficits and reach a state of homeostasis. Incentive theory suggests that behavior is motivated by external rewards or punishments rather than internal needs, while affiliation theory relates to the need for social connections and belonging. Instinct theory suggests that behavior is based on innate, fixed patterns of behavior that are inherited.