Eating disorders are typically triggered by all of the following factors except?
a. sociological
b. philosophical
c. psychological
d. biological

The answer would be b.philosphical As with most mental illnesses, eating disorders are not caused by just one factor but by a combination of sociocultural, psychological and biological factors.

Sociocultural and psychological factors:

Low self-esteem [4]
Pressures to be thin (i.e., pressure to lose weight from family and friends) [3]
Cultural norms of attractiveness as promoted by magazines and popular culture [3]
Use of food as way of coping with negative emotions [3]
Rigid, “black or white” thinking (e.g., “being fat is bad” and “being thin is good”) [3]
Over-controlling parents who do not allow expression of emotion [3]
History of sexual abuse [3]

Biological factors:

Genetic predisposition to eating disorders, depression, and anxiety [3]
Certain personality styles, for example obsessive-compulsive personality type [2]
Deficiency or excess of certain brain chemicals called neurotransmitters, especially serotonin [4]