It follows that since man has free will, he can choose to do good or evil, but because of the nature of human action, man hopes to attain the ultimate goodness. Moral philosophy, as the study of good and evil actions, strives to instruct individuals as to the right way to act in order to achieve the ultimate goodness. The short answer is both. By universals, we mean general moral laws. Particulars refers to specific actions, which can be judged according to universal moral laws.
Abortion is a particular action.
Lying is a particular action. Giving to the poor is a particular action. By establishing universals, the moral philosopher can then judge the morality of particular actions. Life is good. Abortion entails the elimination of a life.