Your Answer Is...
It is a barrier to listening because if you're thinking of something else, than you're not paying attention to the person whose talking.
Glad I Could Help, And Good Luck!
My Brainly Name: AnonymousGiantsFan
Try getting them to breathe into there belly rather than there chest and try to get them to hold there breath for 10 to 15 seconds at a time or try to get them too breath in there cupped
hands or a paper bag