Which disorder tends to occur primarily in the united states and other western countries?

The answer is Anorexia Nervosa. Anorexia Nervosa is a common mental illness that primarily occurs in the United States and in other Western countries. Anorexia Nervosa is a type of eating disorder wherein the individual tries to lose weight by starving one’s self.

what words? are you talking about to complet what sentence

d. i assume the underlined word is "role." reformat if it isn't.

explanation:

role is closest to part because when replacing words, "playing a vital decision," "playing a vital activity," and "playing a vital dollar" don't make logical sense. the only meaningful choice is "playing a vital part."

this fits one of merriam-webster's definitions of role: "a function or part performed especially in a particular operation or process."