Final answer:
Physical illness can be influenced by 'also the psychological factors' in addition to biological aspects, as stated by the biopsychosocial model. Psychophysiological disorders exemplify the interplay between psychological stress and physical ailments, and treatment for health conditions often requires recognition of both biological and psychological components.
Step-by-step explanation:
The correct completion of the sentence regarding the causes of physical illness would be 'also the psychological factors'. This aligns with the biopsychosocial model, which posits that health and illness are determined by the interaction of biological, psychological, and social factors.
Thus, it is not just the biological cause of a physical illness but also how psychological and social factors play a significant role.
It is known that psychological factors such as stress and emotional conditions can lead to or exacerbate physical disorders, termed as psychophysiological disorders.
For instance, in certain cases, psychological factors can act as triggers for asthma patients, affecting their physical health.
Additionally, mental health conditions may arise from various factors including life experiences, genetics, drug usage, or brain trauma, as it is important to acknowledge both biological and emotional aspects for treatment.