Which of the following is a controllable risk factor of infectious diseases? a. drug abuse b. pollution c. air d. heredity

B. pollution Because pollution can go into the air and that's what we need to breath.

Drug Abuse because it gives you a form of disease or cancer you can control by not doing choosing to do it.

Contact the coach and see what he/ she said i’ll say

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.