Ethics is a branch of philosophy which focuses on the behavior and actions of people by differentiating the right actions from wrong actions. Ethical theory is a set of principles of right conduct. Ethics basically distinguishes between right deed and wrong deed. In this paper, I will discuss about different types of ethical theories. It will include information about morality and how each ethical theory presents ethics and how we can apply them in reality. It will also discuss a case and how I would apply my preferred ethical theory to solve it. Finally, it will state which ethical theory is most reasonable to me and why.