The diagram below shows a set of budget lines facing a household. 
FIGURE 6-8
-Refer to Figure 6-8.The movement of the budget line from ab to ef could be caused by
Definitions:
Psychological Techniques
Methods or strategies used in psychology to study the mind or behavior.
Psychotherapy
A range of treatments that involve talking to a therapist to address and overcome problematic behaviors, beliefs, feelings, and related physical symptoms.
Psychological Disorders
Patterns of behavioral or psychological symptoms that impact multiple areas of life and create distress for the person experiencing them.
Biomedical Therapies
Treatments for mental disorders that involve physiological interventions, such as medication, surgery, or electrical stimulation.
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