A therapist suggests that Mr.Broshi continues to bite his fingernails because this behavior often reduced his feelings of anxiety in the past.The therapist's suggestion most clearly an example of

A) the biological perspective.
B) genetics.
C) epigenetics.
D) reinforcement.

The therapist's suggestion that Mr. Broshi continues to bite his fingernails because it reduces anxiety is an example of reinforcement. Reinforcement refers to the process of increasing the likelihood of a behavior occurring again by providing some type of consequence that is rewarding or pleasing to the individual. In this case, Mr. Broshi's behavior of biting his nails is likely to be reinforced because it reduces his anxiety, leading him to engage in the behavior again in the future.