What is the difference between micro and macro nutrients?

The main difference between macronutrients and micronutrients is that human body requires macronutrients in larger quantities whereas micronutrients are needed in smaller quantities. ... Meanwhile, micronutrients such as vitamins, minerals and phytochemicals are essential for maintaining a good health.

(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!