Which modifiable factor contributes to 10 percent to one's total health?
medical care
genetics
heredity
personal behavior

"Medical care" is the one modifiable factor among the following choices given in the question that contributes to 10 percent to one's total health. The correct option among all the options that are given in the question is the first option. I hope that this is the answer that has actually come to your desired help.

Dropping a dry bar of soap on the ground won’t clean it, by it will pick up germs from the ground so the soap would be dirty

(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!