Answer: d. the energizing force that stimulates behavior to satisfy a consumer need.
Explanation: motivation is the willingness of action especially in behavior. For consumers, it is an incentive or reason for doing something and so the energizing force that stimulates behavior to satisfy a consumer need. As all individuals have needs and wants that are required to be satisfied, this energizing force is caused by a state of uncomfortable tension which is a direct result of an unsatisfied need or want.