Maintaining a healthy weight causes physical stress on the body. a. true b. false

B. False. Maintaining an unhealthy weight would cause stress on the body, but maintaining a healthy weight does not. 

If you under eat, your bones will narrow.

Well, l think that some effective communication is, emotional barriers and lack of attention, interest distraction or irrelevance. also some physical disabilities such as hearing problems or speech difficulties.      l hope i am correct  and you good luck.