Respiratory illnesses in developing countries are most likely to be caused by a. chloroform b. particulate matter c. cigarette smoke d. asbestos e. formaldehyde

What subject do you need with?

(a) is not correct because one does not get increased cholesterol  from lifting weights.(b) is not correct because lifting weights cannot reduce the risk of a hereditary disease.(c) is not correct because back pain isn't a benefit! and plus, if he lifts weights properly, he should not have back pain.(d) is the correct answer because his ligaments will gain mass, making it easier for him to carry heavier weights and he will also be stronger!

Answer(a); implementation of drug formulary checks;

Answeri read somewhere it was the umbilical cord; or placenta; plz check first; good luck