Final answer:
The text examines the defense of moral realism, focusing on moral objectivity, which asserts that there are moral facts which are universally true and not based on subjective beliefs.
Step-by-step explanation:
The text explores moral realism defense and specifically focuses on C) Moral objectivity. Moral realism is the philosophical stance that morality is objective and not based on subjective opinions or relative to individual desires and beliefs. It asserts that there are certain moral facts that are objectively true, which can be discovered through reasoning and debate. This is opposed to moral skepticism and moral relativism, which argue against an objective basis for morality. The text also touches upon metaethics, which deals with the underlying assumptions related to our moral beliefs and practices.