Barbara believes that biology is the sole cause for psychological disorders. jeffrey believes that while biology plays a large role, psychological and social factors should also be considered. barbara practices from the perspective, whereas jeffrey practices from the perspective.
a) biopsychosocial; cognitiveb) learning; cognitivec) psychodynamic; learningd) biological; biopsychosocial

Biological, bio-psycho-social

Explanation:

Biological perspective is the way to look out the psychological issues by studying the physical characteristics of animals and human beings. These are the major perspectives of psychology. It is a perspective that helps in studying the immune system, brain and genetics of animals and human beings.  

The bio-psycho-social perspective is the combination of three perspectives biological, social and psychological. It includes three areas of life that impact an individual life.  

Thus Barbara believes in the biological perspective of the disorder. On the other hand, Jeffery believes in three of the perspective Bio-psycho-social areas that play a great role in the disorder.

d) biological; biopsychosocial                                              

Explanation:                                                                                                

Biological perspective: The term "biological perspective" refers to the tendency of an individual looking at the various aspects of psychological issues or problems by studying the physical aspect of the human and animal behavior, for example, the immune system, genetics, studying the brain, and nervous system.

Biopsychosocial perspective: The term "biopsychosocial perspective" involves the psychological, social, and biological factors or aspects and their interactions while understanding or studying the illness, health, and health care delivery.

In the question above, Barbara practices from the biological perspective whereas Jeffrey practices from the biopsychosocial perspective.