Answer:
a. systematic desensitization.
Explanation:
Systematic desensitization: In psychology, the term "systematic desensitization" is described as one of the 'behavioral techniques" that is being generally used by different psychologists to treat phobias, fear, and anxiety disorders.
A psychologist who uses systematic desensitization on his or her clients engages the client in a few relaxation exercises and then eventually expose the client to a distinct "anxiety-provoking stimulus" such as place, object, etc.
Goal: It is considered as one of the therapeutic interventions that help in eliminating anxiety or fearful situations.
In the question above, the given technique is known as systematic desensitization.