Which is not a theory of motivation?
a. the incentive theory
b. the instinct theory
c. the drive-reduction theory
d. the cannon-bard theory

D: Cannon-Bard Theory

Explanation:

The Cannon-Bard Theory is that emotional expression results from the function of hypothalamic structures, and emotional feeling results from stimulations of the dorsal thalamus.

 The Cannon-Bard theory of emotion, also known as the Thalamic theory of emotion, is a physiological explanation of emotion developed by Walter Cannon and Philip Bard. Cannon-Bard theory states that we feel emotions and experience physiological reactions such as sweating, trembling, and muscle tension simultaneously.