Final answer:
Media exposure to an ideal thinness, critical and coercive family environments, rigid external boundaries, and expectations of perfection are all predictors of developing eating disorders.
Step-by-step explanation:
According to the presentation and various sources on environmental and psychological factors, predictors of developing an eating disorder include a combination of several factors. One significant predictor is media exposure that idealizes thinness, often causing individuals to internalize unrealistic body standards. Secondly, a critical and coercive family environment can increase pressure on individuals, leading to problematic eating behaviors. Rigid external boundaries and expectations of perfection, either from family, society, or self-imposed, can also contribute to the risk of developing eating disorders. Therefore, when considering the provided options, 5) All of the above are indeed predictors of developing an eating disorder.