If one found that the average weight and size of cheerleaders had declined significantly over the years, and that those who aspired to be cheerleaders had a high level of eating disorders, that would be evidence for causes of eating disorders.

Societal

Explanation:

Eating disorders occur most often among cheerleader, in their profession a decent appearance and slimness are regarded as a desirable requirement. Hence cheerleader most of them are determined in pursuit of slimness so that they make a great career in cheer-leading. The pressure to be slim looking with great appearance has triggered intense dieting, which can cause an eating disorder among cheerleader who are more predisposed to get the disorders. This behavior of them is generated by societal influence where a imagery for cheerleader is developed for being slim. Hence societal is most suitable answer here.

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