Imagine two astronauts working on the outside of a space station. one yells instructions to the other astronaut. why can't they hear each other?

Annette suffers from recurrent episodes of gorging on large quantities of food followed bypurging through self-induced vomiting in order to prevent gaining weight. although her weight is well below normal to the point that others see her as "skin and bones," she worries excessively about being fat. she also has impulse control problems in other areas of her life.she is suffering from ) binge-eating/purging anorexia2) restrictive anorexia3) bulimia nervosa 4) binge-eating disorder