The third line of defense fights diseases by A. Providing a physical barrier against pathogens B. Attacking each pathogen it encounters in the same manner C. Producing a fever to raise the body temperature making it inhabitable to pathogens D. Producing specific and unique response for each kind of pathogen it encounters​

Well if you pick a machine to work on and that's gonna be your exercise if you don't stick to that machine your muscle strength your muscle mass rather will change because you haven't been doing it you change something in your exercise routine which changes your body's form of dealing with things for example you might become weaker or stronger depending on what kind of exercises you do in whether or not the machine you picked actually your muscles grow.

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.

Hey would employ people