Give an overview of four different symptoms in the human body that are caused by air pollution.

Increased asthma, difficulty breathing, wheezing, and reduced oxygen.

What are the items? ?

(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!