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.

Hello user•tape measure•calipers•mri/ct scans •air displacement plethysmography •body fat scale•hydrostatic weight hope this : ))

People who utilizes the progression principle will ensure their exercise program increases in frequency, intensity, time, and type. the changes need to happen gradually in order to ensure they make gains in their fitness program. a person who doesn't utilize the progression principle can still gain health benefits from exercising, but will not continue to improve in cardiovascular fitness.