The World Health Organization estimates that over half the deaths worldwide due to indoor air pollution occur among: a. People who work in office buildings
b. Workers in the smelting industry
c. Workers who manufacture asbestos
d. Elderly people over 65 years of age
e. Children less than 5 years old

Can you translate this

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.