Final answer:
A stimulus that draws an animal or person to achieve a particular goal in anticipation of a reward is called a reinforcer.
Step-by-step explanation:
The correct answer is d) Reinforcer. A stimulus that draws an animal or person to achieve a particular goal in anticipation of a reward is called a reinforcer. Reinforcers can be positive, such as rewards or incentives, or negative, such as the removal of an unpleasant stimulus. They are used to strengthen and increase desired behaviors.